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The State of Food and Agriculture 2016 (SOFA): Climate change, agriculture and f

 

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ISBN 978-92-5-109374-0

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© FAO 2016

COVER PHOTOGRAPH ©FAO/D. Hayduk

KIROKA, UNITED REPUBLIC OF TANZANIA.

Hand weeding a rice paddy forms part of the System of Rice Intensification method in this climate-smart agriculture project.

CONTENTS

FOREWORD

ACKNOWLEDGEMENTS

ACRONYMS AND ABBREVIATIONS

EXECUTIVE SUMMARY

[CHAPTER 1
HUNGER, POVERTY AND CLIMATE CHANGE: THE CHALLENGES TODAY AND TOMORROW]

Key messages

Complex interactions and inextricable links

The urgency of concerted global action now

The special role and responsibility of agriculture

Structure of this report

[CHAPTER 2
CLIMATE, AGRICULTURE AND FOOD SECURITY: A CLOSER LOOK AT THE CONNECTIONS]

Key messages

Cascading impacts from climate to people

Impacts on agriculture

Impacts on incomes and livelihoods

Millions more at risk of hunger

The agriculture sectors’ role in climate change

Conclusions

[CHAPTER 3
ADAPTING TO CLIMATE CHANGE IN SMALLHOLDER AGRICULTURE]

Key messages

Rethinking pathways out of poverty

Key vulnerabilities to climate change risks

Towards resilient production systems and livelihoods

How much will adaptation cost?

Managing the transition to climate-smart smallholder systems

Conclusions

[CHAPTER 4
FOOD AND AGRICULTURE SYSTEMS IN CLIMATE CHANGE MITIGATION]

Key messages

The technical potential for mitigation with adaptation

Mitigation and adaptation co-benefits that enhance food security

Mitigation costs, incentives and barriers

A food system perspective: minimizing losses and waste, promoting sustainable diets

Conclusions

[CHAPTER 5
THE WAY FORWARD: REALIGNING POLICIES, BUILDING INSTITUTIONAL CAPACITY]

Key messages

Agriculture now central to “intended contributions”

From intentions to action: agriculture in climate strategies

Integrated approaches that align climate and development goals

Strengthening regional and international cooperation

Conclusions

[CHAPTER 6
FINANCING THE WAY FORWARD]

Key messages

Climate finance for agriculture

Making a little go far: using climate finance strategically

Conclusions

Annex: Data on international public climate finance for agriculture, forestry and fisheries

STATISTICAL ANNEX

Notes on the annex tables

Table A.1 – Projected changes in crop yields due to climate change for all locations worldwide

Table A.2 – Net emissions and removals from agriculture, forests and other land use in carbon dioxide equivalent, 2014

Table A.3 – Agricultural emissions in carbon dioxide equivalent by source, 2014

REFERENCES

SPECIAL CHAPTERS OF THE STATE OF FOOD AND AGRICULTURE

TABLES, FIGURES & BOXES

TABLES

1. Climate impacts on selected crop yields, globally and in tropical areas, under warming of 1.5 °C and 2 °C above pre-industrial levels over the 21st century

2. Selected potential impacts of climate change, by region

3. Number of people living in extreme poverty in 2030 with and without climate change, under different climate and socio-economic scenarios

4. Changes in agricultural revenues associated with rising temperatures, in selected areas of Latin America

5. Emissions and removals of main greenhouse gases, by all sectors and by agriculture, forestry and land use (AFOLU) in 2010

6. Three main sources of agricultural greenhouse gas emissions in 2014, by region

7. Impact of climate shocks on agricultural output and productivity

8. Impacts on crop yields under different climate effects in Zambia

9. Differences in nitrogen use in smallholder farming in East Asia and sub-Saharan Africa

10. Opportunity costs of implementing improved grazing management, Qinghai Province, China

11. Potential for N2O mitigation of annual emissions under five scenarios of improved practices, 2030 and 2050 (cumulative effects)

12. Examples of agricultural practices leading to reductions in soil carbon stocks

FIGURES

1. Impacts of climate change on cereal yields across regions by 2050

2. Shares of greenhouse gas emissions from economic sectors in 2010

3. Impact pathways: from climate change to food security

4. Projected changes in crop yields for all locations worldwide owing to climate change

5. Projected changes in crop yields in developing regions owing to climate change

6. Projected changes in crop yields in developed regions owing to climate change

7. Impacts of climate change on crop yields, area, production, prices and trade in 2050 at the global level

8. Impacts of climate change on population at risk of hunger in 2050, by region

9. Population at risk of hunger, with and without climate change

10. Food insecurity and climate change vulnerability: Present day, worst case and best case scenarios

11. Annual average net emissions/removals from AFOLU in CO2 equivalent

12. Net emissions/removals from AFOLU in CO2 equivalent in 2014, by region

13. Share of agricultural emissions in CO2 equivalent in 2014, by source and at global level

14. Change in 2050 in the number of people at risk of hunger, relative to the baseline scenario, after adoption of improved agricultural technologies

15. Economic mitigation potential in the AFOLU sector in 2030, by region

16. From international commitments and mechanisms to national policies and institutions

17. Average annual international public finance for mitigation and/or adaptation by sector and source, 2010–14

18. Average annual multilateral commitments and disbursements by sector, 2010–14

BOXES

1. Four dimensions of food security

2. Climate change and nutrition

3. Agriculture prominent in guides to country-level action

4. A common vision of sustainable food and agriculture

5. Summary of climate change impacts on agriculture

6. The impacts of extreme climate events

7. Projecting climate change: RCPs and SSPs

8. Rural women are among the most vulnerable

9. Genetic diversity improves resilience

10. Benefits of water saving in China

11. Climate-smart aquaculture in Viet Nam

12. Climate risk, diversification and small farmer welfare in Malawi and Zambia

13. Benefits and costs of investing in small farmer adaptation

14. Factors that hinder adaptive capacity

15. Re-orienting research for climate challenge

16. Carbon and nitrogen in the agriculture sectors

17. Nuclear and isotopic techniques for mitigation

18. Methane abatement strategies in livestock and paddy rice production

19. Restoration of degraded grasslands in China

20. Food system emissions: energy use along supply chains

21. The agriculture sectors and UNFCCC

22. The need for policy coherence between agriculture and energy

23. Disaster risk reduction for food security and nutrition

24. Knowledge gaps and data challenges

25. Dedicated climate funds and the agriculture sectors

26. Towards sustainability and resilience in sub-Saharan Africa

27. Integrating climate change into economic appraisals

28. Mainstreaming climate change in international financing institutions

FOREWORD

Following last year’s historic Paris Agreement and the 2030 Agenda for Sustainable Development – marking a path towards a more sustainable future – 2016 is about putting commitments into action. The rapid change in the world’s climate is translating into more extreme and frequent weather events, heat waves, droughts and sea-level rise.

The impacts of climate change on agriculture and the implications for food security are already alarming – they are the subjects of this report. A major finding is that there is an urgent need to support smallholders in adapting to climate change. Farmers, pastoralists, fisherfolk and community foresters depend on activities that are intimately and inextricably linked to climate – and these groups are also the most vulnerable to climate change. They will require far greater access to technologies, markets, information and credit for investment to adjust their production systems and practices to climate change.

Unless action is taken now to make agriculture more sustainable, productive and resilient, climate change impacts will seriously compromise food production in countries and regions that are already highly food-insecure. These impacts will jeopardize progress towards the key Sustainable Development Goals of ending hunger and poverty by 2030; beyond 2030, their increasingly negative impacts on agriculture will be widespread.

Through its impacts on agriculture, livelihoods and infrastructure, climate change threatens all dimensions of food security. It will expose both urban and rural poor to higher and more volatile food prices. It will also affect food availability by reducing the productivity of crops, livestock and fisheries, and hinder access to food by disrupting the livelihoods of millions of rural people who depend on agriculture for their incomes.

Hunger, poverty and climate change need to be tackled together. This is, not least, a moral imperative as those who are now suffering most have contributed least to the changing climate. The report describes ways of adapting smallholder production to climate change and making the livelihoods of rural populations more resilient. Diversification and better integration of food production systems into complex ecological processes create synergies with the natural habitat instead of depleting natural resources. Agroecology and sustainable intensification are examples of approaches that improve yields and build resilience through practices such as green manuring, nitrogen-fixing cover crops and sustainable soil management, and integration with agroforestry and animal production.

More resilient agriculture sectors and intelligent investments into smallholder farmers can deliver transformative change, and enhance the prospects and incomes of the world’s poorest while buffering them against the impacts of climate change. This report shows how the benefits of adaptation outweigh the costs of inaction by very wide margins. For this transformation towards sustainable and more equitable agriculture, access to adequate extension advice and markets must improve, while insecurity of tenure, high transaction costs, and lower resource endowments, especially among rural women, are barriers that will need to be overcome.

Livelihood diversification can also help rural households manage climate risks by combining on-farm activities with seasonal work, in agriculture and in other sectors. In all cases, social protection programmes will need to play an important role – in helping smallholders better manage risk, reducing vulnerability to food price volatility, and enhancing the employment prospects of rural people who leave the land.

In order to keep the increase in global temperature below the crucial ceiling of 2 °C, emissions will have to be reduced by as much as 70 percent by 2050. Keeping climate change within manageable levels can only be achieved with the contribution of the agriculture sectors. They now account for at least one-fifth of total emissions, mainly from the conversion of forests to farmland as well as from livestock and crop production. The challenge is to reduce those emissions while meeting unprecedented demand for food.

The agriculture sectors can substantially contribute to balancing the global carbon cycle. Similarly, in the forestry sector, avoiding deforestation, increasing the area under forest, and adopting sustained-yield management in timber production can bind large amounts of atmospheric carbon dioxide (CO2). Soils are pivotal in regulating emissions of CO2 and other greenhouse gases. Appropriate land use and soil management lead to improved soil quality and fertility and can help mitigate the rise of atmospheric CO2.

It is essential that national commitments – the country pledges that form the basis of the 2015 Paris Agreement on climate change – turn into action. The Conference of the Parties that will be held in November 2016 in Morocco will have a clear focus on implementation in the agriculture sectors. This report identifies strategies, financing opportunities and data and information needs, and describes transformative policies and institutions that can overcome barriers to implementation. As countries revise and, hopefully, ramp up their national plans, success in implementing their commitments – particularly in the agriculture sectors – will be vital to creating a virtuous circle of higher ambition.

Climate change is a cornerstone of the work undertaken by FAO. To assist its Members, we have invested in areas that promote food security hand in hand with climate change adaptation and mitigation. FAO is helping to reorient food and agricultural systems in countries most exposed to climate risks, with a clear focus on supporting smallholder farmers.

FAO works in all its areas of expertise, pursuing new models of sustainable, inclusive agriculture. Through the Global Soil Partnership, FAO promotes investment to minimize soil degradation and restore productivity in regions where people are most vulnerable, thus stabilizing global stores of soil organic matter.

We participate in the Global Agenda for Sustainable Livestock, and have launched a programme to reduce enteric emissions of methane from ruminants using measures suited to local farming systems. In the fisheries sector, our Blue Growth Initiative is integrating fisheries and sustainable environmental management, while a joint programme with the European Union aims at protecting carbon-rich forests. We provide guidance on including genetic diversity in national climate change adaptation planning, and have joined forces with the United Nations Development Programme to support countries as they integrate agriculture in adaptation plans and budgeting processes. FAO also helps link developing countries to sources of climate financing.

The international community needs to address climate change today, enabling agriculture, forestry and fisheries to adopt climate-friendly practices. This will determine whether humanity succeeds in eradicating hunger and poverty by 2030 and producing food for all. “Business as usual” is not an option. Agriculture has always been the interface between natural resources and human activity. Today it holds the key to solving the two greatest challenges facing humanity: eradicating poverty, and maintaining the stable climatic corridor in which civilization can thrive.

José Graziano da Silva

FAO Director-General

ACKNOWLEDGEMENTS

The State of Food and Agriculture 2016 was prepared by a multi-disciplinary team of the Food and Agriculture Organization (FAO) under the direction of Rob Vos, Director of FAO’s Agricultural Development Economics Division (ESA) and Andrea Cattaneo, Senior Economist and Editor of The State of Food and Agriculture. Overall guidance was provided by Kostas Stamoulis, Assistant Director General ad interim of the Economic and Social Development Department (ESD). Guidance was also provided by Maria Helena Semedo, Deputy Director General for Natural Resources and by the Economic and Social Development Department Management team. Significant contributions to the report were made by Rene Castro Salazar, Assistant Director General of FAO’s Forestry Department and Martin Frick, Director of the Climate and Environment Division.

RESEARCH AND WRITING TEAM

Jakob Skøt (Team leader, ESA), Leslie Lipper (Lead technical advisor, ESA), Graeme Thomas (Consulting editor), Astrid Agostini (Climate and Environment Division), Raffaele Bertini (ESA), Cassandra De Young (Fisheries and Aquaculture Department), Sarah Lowder (ESA), Alexandre Meybeck (Agriculture and Consumer Protection Department), Anne Mottet (Animal Production and Health Division), Selvaraju Ramasamy (Climate and Environment Division), Simmone Rose (Forestry Department), Henning Steinfeld (Animal Production and Health Division).

CONTRIBUTORS

Background papers

Franck Ackermann (Synapse Energy Economics, USA), Benjamin Bodirsky (Potsdam Institute for Climate Impact Research, Germany), Oscar Cacho (University of New England, Australia), Angela Cadena Monroy (Universidad de los Andes, Colombia), Alessandro De Pinto (International Food Policy Research Institute), Pierre Gerber (World Bank), Ben Henderson (Commonwealth Scientific and Industrial Research Organisation, Australia), Mario Herrero (Commonwealth Scientific and Industrial Research Organisation, Australia), Ana María Loboguerrero (CGIAR Research Program on Climate Change, Agriculture and Food Security), Mario Londoño (Universidad de los Andes, Colombia), Alberto Millán (International Center for Tropical Agriculture), Jonathan Moss (University of New England, Australia), Marigold Norman (Overseas Development Institute, UK), Oene Oenema (Wageningen University, The Netherlands), Katherine Ovalle Sanabria (Ministry of Environment and Sustainable Development, Colombia), Vittoria Pinca (Consultant), Dave Robb (Consultant), Marc Sadler (World Bank), Jean-François Soussana (Institut national de la recherche agronomique, France), Rita Strohmaier (Karl-Franzens-Universität, Austria), Rodrigo Suarez Castaño (Ministry of Environment and Sustainable Development, Colombia), Mark Sutton (Centre for Ecology and Hydrology, UK), Stacy A. Swann (World Bank), Timothy Thomas (International Food Policy Research Institute), Philip Thornton (International Livestock Research Institute), Caroline Van der Does de Willebois (Consultant), Ioannis Vasileiou (International Food Policy Research Institute), Keith Wiebe (International Food Policy Research Institute).

Additional FAO inputs

Adriana Arango Guillen, Aslihan Arslan, Solomon Asfaw, Stephen Baas, Tarub Bahri, Karel Callens, Clayton Campanhola, Frederic Castell, Barbara Cooney, Olivier Dubois, Jean Marc Faurès, Michelle Kendrick, Nancy McCarthy, Matta Rao, Doris Soto, Francesco Tubiello.

Statistical annex

The annex was prepared by Raffaele Bertini and Sarah Lowder.

Annex Table 1 is based on data provided by Andrew Challinor, Julian Ramirez-Villegas, and James Watson.

Permission to use the data for this report is gratefully acknowledged.

Annex Tables 2 and 3 is based on FAOSTAT data, produced jointly by the Statistics Division and the Climate and Environment Division of FAO.

Administrative support

Paola Di Santo and Liliana Maldonado.

FAO gratefully acknowledges the advice and guidance provided by technical workshop with the participation of: Alessandro De Pinto (International Food Policy Research Institute), Fiona Guy (World Food Programme), Ada Ignaciuk (Organisation for Economic Co-operation and Development), Alberto Millán (World Bank), Torben Nilsson (International Fund for Agricultural Development), Marigold Norman (Overseas Development Institute, UK), Shivaji Pandey (Independent expert), Rita Strohmaier (Karl-Franzens-Universität, Austria), Terry Sunderland (Center for International Forestry Research), Keith Wiebe (International Food Policy Research Institute).

Translation and printing services were delivered by the Meeting Programming and Documentation Service of the FAO Conference, Council and Protocol Affairs Division.

The Publishing Group in FAO’s Office for Corporate Communication provided editorial support, design and layout for all six official languages.

ACRONYMS AND ABBREVIATIONS

AFOLU

agriculture, forestry and other land use

AgMIP

Agricultural Model Intercomparison and Improvement Project

ASAP

Adaptation for Smallholder Agriculture Programme

BCR

benefit-cost ratio

C

carbon

CFU

ODI Climate Fund Update

CH4

methane

CO2

carbon dioxide

COP

UNFCCC Conference of the Parties

CRS

OECD Creditor Reporting System

CSA

climate-smart agriculture

GDP

gross domestic product

GEF

Global Environment Facility

GHG

greenhouse gas

Gt

gigatonne (billion tonnes)

GtC

Gt of carbon

GtCO2-eq

Gt of carbon dioxide equivalent

ha

hectare

IDA

International Development Association

IFAD

International Fund for Agricultural Development

IFPRI

International Food Policy Research Institute

IMPACT

International Model for Policy Analysis of Agricultural Commodities

INDC

Intended Nationally Determined Contributions

IPCC

Intergovernmental Panel on Climate Change

LDC

Least developed country

LULUCF

land use, and land-use change and forestry

N

nitrogen

N2O

nitrous oxide

NAMA

Nationally Appropriate Mitigation Actions

NAP

National Adaptation Plans

NAPA

National Adaptation Programmes of Action

NDC

Nationally Determined Contributions

NPV

net present value

ODI

Overseas Development Institute

OECD

Organisation for Economic Co-operation and Development

RCP

Representative Concentration Pathway

REDD

Reducing emissions from deforestation and forest degradation

SOC

soil organic carbon

SSP

Shared Socio-economic Pathway

SME

small and medium enterprises

t

tonne

UNDP

United Nations Development Programme

UNFCCC

United Nations Framework Convention on Climate Change

WTO

World Trade Organization

EXECUTIVE SUMMARY

THE WORLD FACES AN UNPRECEDENTED DOUBLE CHALLENGE: TO ERADICATE HUNGER AND POVERTY AND TO STABILIZE THE GLOBAL CLIMATE BEFORE IT IS TOO LATE

In adopting the goals of the 2030 Agenda on Sustainable Development and the Paris Agreement on Climate Change, the international community took responsibility for building a sustainable future. But meeting the goals of eradicating hunger and poverty by 2030, while addressing the threat of climate change, will require a profound transformation of food and agriculture systems worldwide.

Achieving the transformation to sustainable agriculture is a major challenge. Changes will need to be made in a way that does not jeopardize the capacity of the agriculture sectors – crops, livestock, fisheries and forestry – to meet the world’s food needs. Global food demand in 2050 is projected to increase by at least 60 percent above 2006 levels, driven by population and income growth, as well as rapid urbanization. In the coming decades, population increases will be concentrated in regions with the highest prevalence of undernourishment and high vulnerability to the impacts of climate change. At the same time, efforts by the agriculture sectors to contribute to a carbon-neutral world are leading to competing demands on water and land used to produce food and energy, and to forest conservation initiatives that reduce greenhouse gas emissions but limit land available for crop and livestock production.

The transformation will also need to involve millions of food producers in adapting to climate change impacts, which are already being felt in the agricultural sectors and especially so in tropical regions, which are home to most of the poor and food insecure. It must also reverse the widespread degradation of agriculture’s natural resource base – from soil to forests to fisheries – which threatens the very sustainability of food production.

A broad-based transformation of food and agriculture systems is needed, therefore, to ensure global food security, provide economic and social opportunities for all, protect the ecosystem services on which agriculture depends, and build resilience to climate change. Without adaptation to climate change, it will not be possible to achieve food security for all and eradicate hunger, malnutrition and poverty.

BECAUSE ADVERSE IMPACTS WILL WORSEN WITH TIME, A GLOBAL TRANSFORMATION TO SUSTAINABLE FOOD AND AGRICULTURE MUST BEGIN NOW

The effects of climate change on agricultural production and livelihoods are expected to intensify over time, and to vary across countries and regions. Beyond 2030, the negative impacts of climate change on the productivity of crops, livestock, fisheries and forestry will become increasingly severe in all regions.

Productivity declines would have serious implications for food security. Food supply shortfalls would lead to major increases in food prices, while increased climate variability would accentuate price volatility. Since the areas most affected would be those with already high rates of hunger and poverty, food price increases would directly affect millions of low-income people. Among the most vulnerable will be those who depend on agriculture for their livelihood and income, particularly smallholder producers in developing countries.

While climate change is but one driver of poverty and food insecurity, its impacts are expected to be substantial. In the absence of climate change, and with continuing economic progress, most regions are projected to see a decline in the number of people at risk of hunger by 2050. With climate change, however, the population living in poverty could increase by between 35 and 122 million by 2030 relative to a future without climate change, largely due to its negative impacts on incomes in the agricultural sector. The increase in the number of poor would be biggest in sub-Saharan Africa, partly because its population is more reliant on agriculture.

Food and agriculture must be central to global efforts to adapt to climate change, through policies and actions that address vulnerabilities and risks and promote agricultural systems that are resilient and sustainable. This action must begin now – with the increasing intensity of climate change impacts, building resilience will become ever more difficult. Delaying the transformation of the agricultural sectors will force poorer countries to fight poverty, hunger and climate change at the same time.

ECONOMICALLY VIABLE AND SUSTAINABLE FARMING PRACTICES ARE AVAILABLE, BUT BARRIERS TO THEIR ADOPTION MUST BE OVERCOME

Significant improvements in food security, as well as resilience to climate change can be achieved with the introduction of sustainable agricultural practices. Wide adoption of practices such as the use of nitrogen-efficient and heat-tolerant crop varieties, zero-tillage and integrated soil fertility management would boost productivity and farmers’ incomes, and help lower food prices. By one estimate, the number of people at risk of undernourishment in developing countries in 2050 could be reduced by more than 120 million through widespread use of nitrogen-efficient crop varieties alone.

Despite this potential, the adoption by farmers of improved practices is still very limited. Often, adoption is hampered by policies, such as input subsidies, that perpetuate unsustainable production practices rather than those that promote resource-use efficiency, soil conservation and the reduction in the intensity of agriculture’s own greenhouse gas emissions. Smallholders, especially, face a broad range of barriers on the path to sustainable agriculture, such as limited access to markets, credit, extension advice, weather information, risk management tools and social protection. Women, who make up around 43 percent of the agricultural labour force in developing countries, are especially disadvantaged, with fewer endowments and entitlements than men, even more limited access to information and services, gender-determined household responsibilities, and increasingly heavy agricultural workloads owing to male out-migration.

There is no simple “technological fix”. What is needed is a reorientation of agricultural and rural development policies that resets incentives and lowers the barriers to the transformation of food and agricultural systems. Particular attention should be given to supporting low-income smallholder farmers in strengthening their capacity to manage risks and adopt effective climate change adaptation strategies.

MOVING BEYOND FARMING PRACTICES: SMALLHOLDERSADAPTATION TO CLIMATE CHANGE RISKS WILL BE CRITICAL FOR GLOBAL POVERTY REDUCTION AND FOOD SECURITY

The sheer number of smallholder farm families in developing countries – some 475 million – justifies a specific focus on the threat posed by climate change to their livelihoods and the urgent need to transform those livelihoods along sustainable pathways. It will be difficult, if not impossible, to eradicate global poverty and end hunger without building resilience to climate change in smallholder agriculture through the widespread adoption of sustainable land, water, fisheries and forestry management practices. With other enabling factors in place – such as adequate access to credit and markets, but also action to eliminate legal, socio-cultural and mobility constraints on rural women – those practices have been found to yield significant productivity improvements. However, improved management practices may not be enough to sustain farmer incomes.

Farmers can further enhance their resilience through diversification, which can reduce the impact of climate shocks on income and provide households with a broader range of options when managing future risks. One form of diversification is to integrate production of crops, livestock and trees – for example, some agroforestry systems use the leaves of nitrogen-fixing leguminous trees to feed cattle, use manure to fertilize the soil, and grow pulses to provide extra protein during periods of seasonal food insecurity.

For farm households with limited options for on-farm diversification, livelihood diversification through non-farm rural employment or migration to cities may be essential. Adaptation through sustainable intensification and agricultural diversification may have to be combined, therefore, with the creation of off-farm opportunities, both locally and through strengthened rural-urban linkages. Gender issues may need to be addressed – social norms often prevent women from pursuing off-farm activities. Social protection, education and active labour market policies are needed to mitigate many of the risks associated with diversification and migration.

ONE-FIFTH OF GREENHOUSE GAS EMISSIONS ARE GENERATED BY AGRICULTURE, FORESTRY AND LAND-USE CHANGE; THE AGRICULTURE SECTORS NEED TO CONTRIBUTE TO CONTAINING GHG EMISSIONS

The challenge of adaptation to climate change will become greater over time if we do not act now to reduce emissions of the greenhouse gases responsible for global warming. Emissions will have to be drastically reduced in order to keep climate change in check and keep the global temperature increase no higher than 1.5 oC or 2 oC, compared with pre-industrial levels. This is a global responsibility and requires all economic sectors to shift to low emission intensity.

Agriculture, and the food sector at large, have an important responsibility in climate change mitigation. Taken together, agriculture, forestry and land-use change account for about one-fifth of global GHG emissions. Carbon dioxide emissions from agriculture are mainly attributable to losses of above and below ground organic matter, through changes in land use, such as conversion of forests to pasture or cropland, and land degradation such as caused by over-grazing. The bulk of direct emissions of methane and nitrous oxide, two potent GHGs, are the result of enteric fermentation in livestock, rice production in flooded fields, and the application of nitrogen fertilizer and manure, all of which can be reduced through the implementation of better management practices.

The share of the food system as a whole in total global GHG emissions is even greater – further emissions are generated by the manufacture of agrochemicals, by fossil energy use in farm operations, and in post-production transportation, processing and retailing.

AGRICULTURE’S CONTRIBUTION TO CLIMATE CHANGE ADAPTATION AND MITIGATION IS FEASIBLEBUT REQUIRES ACTION ON A BROAD FRONT

Broad-based agricultural and rural development can help reduce exposure and sensitivity to climate shocks and enable farmers to benefit from new opportunities for improving rural livelihoods and food security. This report shows how the adoption of improved management practices will help to achieve a significant reduction in the number of food insecure. However, improvements in infrastructure, extension, climate information, access to credit, and social insurance, which are at the heart of rural development, need to go hand in hand in order to foster the adoption of improved practices and the diversification of rural livelihoods.

Available estimates suggest that the aggregate cost of adaptation and making farm systems more resilient are only a fraction of the costs of inaction. Adaptation efforts make good economic sense and also have considerable potential to reduce the GHG emissions generated by agriculture, forestry and land-use change. Increasing resource-use efficiency, cutting the use of fossil fuels and avoiding direct environmental degradation will save farmers money, enhance productivity sustainably and reduce dependence on external inputs.

Multiple concrete examples exist of how efforts at adaptation and mitigation can go hand in hand. Improvements in crop production and fertilizer management appear to offer the greatest potential for reducing nitrous oxide emissions, while also reducing input costs. Increasing stocks of soil organic carbon improves crop yields and builds resilience to drought and flooding, but also sequesters carbon. Alternate wetting and drying of rice fields reduces methane emissions from paddies by 45 percent, while saving water and producing yields similar to those of fully flooded rice. In both temperate and tropical regions, farming system diversification and crop-livestock-tree integration could increase farm-scale efficiency, reduce emissions intensity and raise productivity. In the livestock sector, the general adoption of sustainable practices could cut livestock methane emissions by up to 41 percent while also increasing productivity through better animal feeding, animal health and herd structure management. However, the uptake of these practices is often low in many areas. Efforts to foster their adoption by smallholders need to be informed by a thorough understanding of the existing financial, institutional and policy barriers.

As agricultural production increases to meet demand, so too will its emissions. Major improvements in the management of the carbon and nitrogen cycles in agriculture would be needed to achieve a reduction in emission intensities – or emissions per unit of agricultural output – to counterbalance the tendency of the agriculture sectors to emit more as they produce more. Hence, achieving the mitigation potential in the agriculture sectors will not be easy – not only because of the major transformations needed in agriculture for broader adoption of improved practices, but also because of projected increases in demand for agricultural products.

Not all mitigation options can be seen as adaptation measures with important mitigation co-benefits. Other initiatives are intrinsically driven by a mitigation motive. For example, putting a halt to deforestation and forest degradation arguably has the largest potential for emission reduction in the agriculture sectors. This should be a top priority, but will require accepting trade-offs: reducing deforestation often comes at a cost to the farmer. Efforts in this direction are under way through the REDD+ initiative, under the umbrella of the United Nations Framework Convention on Climate Change (UNFCCC). Although emissions from the conversion of forests have declined significantly over the past two decades, the trade-offs involved make these gains fragile. Unlike other economic sectors where adaptation and mitigation actions are generally independent of each other, in the agriculture sectors the objectives of food security, adaptation and mitigation, are interlinked.

Even the widespread adoption of climate-smart, sustainable agriculture may fall short of what is needed to meet global climate targets. Big adjustments are required in food systems at large. About one-third of all food produced in the world is lost or wasted post-harvest. Reducing food losses and waste would not only improve the efficiency of the food system, but would also reduce both pressure on natural resources and emissions of greenhouse gases. The energy use and emission-intensity of food processing, conservation and transportation are high and increasing. Reducing emission intensity along the entire food chain will require significant changes in consumer awareness, as well as price incentives that favour food items with much smaller environmental footprints. Rebalancing diets towards less animal-sourced foods would make an important contribution in this direction, with probable co-benefits for human health.

PARIS AGREEMENT COMMITMENTS NEED TO UNDERPIN SYSTEM-WIDE ACTION IN FOOD AND AGRICULTURE

Transformative change in agriculture and food systems appears to be economically and technically feasible. However, change will only come about if supported by appropriate policies, institutional frameworks and investment finance mechanisms. These enabling factors are important for agricultural development in general, but are made even more necessary by climate change. Policy frameworks need to be drastically modified to align agricultural development, food security and nutrition, and climate stability objectives.

The Intended Nationally Determined Contributions (INDCs), which formed the basis of the 2015 Paris Agreement on Climate Change, are now to become Nationally Determined Contributions (NDCs) to global climate objectives, through policies and actions. The agriculture sectors feature prominently in the INDCs, with 94 percent of all countries including them in their mitigation and/or adaptation contributions. Developing countries highlight the importance of agriculture and food security for adaptation; often, they also include the agriculture sectors as contributing to their mitigation targets. Around one-third of all countries refer in their INDCs to the potential co-benefits between mitigation and adaptation in agriculture. There is a clear willingness of countries to respond to climate change by transforming and investing in the agriculture sectors.

Many countries have designed broad climate change policies and strategies, which establish global objectives and targets. However, few have spelled out the details of action plans to achieve climate targets. The INDCs are a first step in a much broader process of rethinking agricultural and rural development under climate change. The UNFCCC has already established meaningful mechanisms, such as National Adaptation Plans, to underpin concerted actions to address climate change. In line with the policy recommendations of this report, those mechanisms should be integrated into broader agricultural and food security and nutrition policies, and vice-versa.

POLICIES ON CLIMATE, AGRICULTURE, FOOD AND NUTRITION SHOULD BE REALIGNED AND INTEGRATED

Policies, market forces and environmental constraints drive the use of inputs and other resources in agriculture, influencing productivity and the degree of conservation or depletion of natural resources. Policy-making for agriculture under climate change should start from an understanding of those drivers and their impacts on farmers’ livelihoods and the environment. This is a complex task and win-win solutions may not always be possible. Drivers vary significantly between countries and regions – smallholder farmers do not have the same capacity as global agribusinesses to respond to policy and market signals.

Policymakers must recognize the need to manage trade-offs, and set out concrete measures for better aligning multiple objectives and incentive structures. For example, the gender equity trade-offs of planned actions need to be systematically analysed – a shift to more resilient intercropping systems has sometimes cost women their control over specific crops. One area with a large potential for policy realignment is the redesign of agricultural support measures in a way that facilitates, rather than impedes, the transition to sustainable agriculture. In 2015, developed and major developing countries spent more than US$560 billion on agricultural production support, including subsidies on inputs and direct payments to farmers. Some measures, such as input subsidies, may induce inefficient use of agrochemicals and increase the emissions intensity of production. Making support conditional upon the adoption of practices that lower emissions and conserve natural resources is one way of aligning agricultural development and climate goals.

Policies on nutrition, food consumption, food price support, natural resources management, infrastructure development, energy and so on, may similarly need to be re-set. To address trade-offs, the process must ensure greater inclusiveness and transparency in decision-making, as well as incentives that provide long-term public and collective benefits. For example, experience shows that forests can be well managed and degradation reversed by involving local communities, supported by legitimate decentralized institutional arrangements developed through consultative processes.

Climate change brings new risks. Managing them requires enhanced forms of collective action and systems that assess risks, vulnerabilities and adaptation options. Well-designed social protection programmes, which guarantee minimum incomes or access to food, have an important role to play, but should be aligned with other forms of climate risk management. Instead of simply responding to extreme events, disaster risk reduction should be embedded in broader strategies for climate change adaptation.

In responding to climate change, international cooperation and multi-stakeholder partnerships and alliances are essential. For example, climate change will lead to new pests and disease problems and increase the risks of their transboundary movement. Strengthened regional and international cooperation will be needed to facilitate information and knowledge sharing, to manage common resources such as fish stocks, and to conserve and utilize agrobiodiversity. Cooperation is also needed to close gaps in our knowledge of climate change impacts on agriculture, food security and nutrition, to evaluate the scalability and economic viability of sustainable farming practices, and to assess the ecological footprint of food systems at large.

AGRICULTURAL AND CLIMATE FINANCE NEED TO BE LINKED AND LEVERAGED TO INDUCE TRANSFORMATIVE CHANGE IN AGRICULTURE

More climate financing and agricultural investments are need to facilitate the transition to sustainable agricultural practices. However, available finance for investment in agriculture falls well short of needs. Smallholder producers in developing countries face major hurdles in accessing credit for investing in new technologies and practices, and female farmers even more so. The shortfall in finance limits investment in agriculture and food security and, with it, the capacity of smallholders to adapt to climate change.

More climate finance needs to flow to agriculture to fund the investment cost associated with the required large-scale transformation of its sectors and the development of climate-smart food production systems. Additional finance from public sources, as well as customized financial products, will be needed in two areas of financing.

First, more upfront support is necessary for increasing farmers’ productivity, building capacity to adapt to climate change and reducing the emissions intensity of production. This will require a significant increase in the amount of finance available, and more flexible conditions, such as repayment schedules adjusted to cash flows. This approach would allow farmers to make the investments that maintain current yields using fewer resources, and apply climate-smart practices and technologies that increase resilience while reducing emissions. However, for this to be successful, a second area requires financing – building capacity through appropriate institutions and policies, so that farmers are enabled to undertake transformational changes. Improving the enabling environment is especially needed for the vast majority of smallholder farmers, who are effectively disenfranchised from climate financing and denied opportunities for investing in productive activities that would improve their livelihoods, productivity and incomes.

Although more climate finance is needed for the transformation envisioned by this report, additional funding will also require improving countries’ capacity to make things happen on the ground. Systemic capacity constraints currently hamper developing country access to and effective use of climate finance for agriculture. This “capacity gap” in policy-making and institutional development, which can manifest itself at both funding and receiving ends, hinders support for the transition to sustainable agriculture. Closing these capacity gaps should be made a priority by funders and countries alike, so that climate finance – if countries ramp up funding as planned – can serve its transformative role for food and agriculture.

Climate finance can also act as a catalyst to leverage larger flows of public and private funding for sustainable agriculture, provided policies and institutional frameworks that promote transformative change are in place. Climate finance could help address the funding gap by demonstrating the viability of climate-smart agricultural investments, and designing and piloting innovative mechanisms to leverage additional sources of investment. Climate funds – if used strategically to build the enabling environment essential for climate-smart agricultural development, to ensure that public agricultural investment is climate-smart, and to leverage private finance – could become an important catalyst for climate change adaptation and mitigation.

By filling the financing gap and catalysing investment, climate finance can strengthen risk management mechanisms, foster development of appropriate financial products, and address the capacity constraints of lenders and borrowers. It is crucial, therefore, to strengthen the enabling environment for climate-smart agricultural investments, mainstream climate change considerations in domestic budget allocations and implementation, and unlock private capital for climate-smart agricultural development. Until that happens, the climate financing needed for investment in smallholder agriculture will continue to be inadequate, with serious consequences in terms of loss of livelihoods and increased food insecurity.

The time to invest in agriculture and rural development is now. The challenge is garnering diverse financing sources, aligning their objectives to the extent possible, and creating the right policy and institutional environments to bring about the transformational change needed to eradicate poverty, adapt to climate change and contribute to limiting greenhouse gas emissions.

KEY MESSAGES

1CLIMATE CHANGE ALREADY AFFECTS AGRICULTURE AND FOOD SECURITY and, without urgent action, will put millions of people at risk of hunger and poverty.

2While IMPACTS ON AGRICULTURAL YIELDS AND LIVELIHOODS will vary across countries and regions, they will become increasingly adverse over time and potentially catastrophic in some areas.

3LIMITING GLOBAL TEMPERATURE INCREASES TO 1.5 °C ABOVE PRE-INDUSTRIAL LEVELS would significantly reduce the risks and impacts of climate change.

4DEEP TRANSFORMATIONS IN AGRICULTURE AND FOOD SYSTEMS, from pre-production to consumption, are needed in order to maximize the co-benefits of climate change adaptation and mitigation efforts.

5THE AGRICULTURE SECTORS HAVE POTENTIAL TO LIMIT THEIR GREENHOUSE GAS EMISSIONS, but ensuring future food security requires a primary focus on adaptation.

Climate change poses a major and growing threat to global food security. The expected effects of climate change – higher temperatures, more frequent extreme weather events, water shortages, rising sea levels, ocean acidification, land degradation, the disruption of ecosystems and the loss of biodiversity – could seriously compromise agriculture’s ability to feed the most vulnerable, impeding progress towards the eradication of hunger, malnutrition and poverty. Action is urgently needed, therefore, to prepare crop and livestock production, fisheries and forestry for the prospect of rapidly changing environmental conditions and to reduce agriculture’s own contribution to the greenhouse gas (GHG) emissions responsible for global warming.

Even without climate change, world agriculture and food security face daunting challenges. Population growth and rising incomes in much of the developing world have pushed demand for food and other agricultural products to unprecedented levels. The Food and Agriculture Organization (FAO) has estimated that in order to meet the demand for food in 2050, annual world production of crops and livestock will need to be 60 percent higher than it was in 2006. About 80 percent of the required increase will need to come from higher yields and 10 percent from increases in the number of cropping seasons per year (Alexandratos and Bruinsma, 2012). However, widespread land degradation and increasing water scarcity limit the potential for yield increases. Without heightened efforts to reduce poverty, and to make the transition to an agriculture that is both productive and sustainable, many low-income countries will find it difficult to ensure access to adequate quantities of food for all of their populations.

Through its impacts on agriculture, climate change will exacerbate the negative effects of all those trends, and will make it even more difficult to meet the key Sustainable Development Goals of ending hunger, achieving year-round food security, and ensuring sustainable food production systems by 2030. In the longer term, the magnitude and speed of climate change, and the effectiveness of economy-wide mitigation efforts and of adaptation in agriculture, will be critical to the future of large segments of the world’s population and, possibly, to humanity at large.

COMPLEX INTERACTIONS AND INEXTRICABLE LINKS

The agriculture sectors – crops, livestock, fisheries, aquaculture and forestry – have unique characteristics that place them at the centre of global efforts to adapt to climate change. First, agriculture is essential to our food supply and, therefore, to meeting the most basic of human needs. Further, food production depends directly on natural resources – including biodiversity, land, vegetation, rainfall and sunlight – which are, in turn, intimately and inextricably linked to climate and weather conditions. Since agriculture also provides livelihoods for almost two-thirds of the world’s extremely poor, or some 750 million people, climate change impacts on agriculture directly affect already vulnerable rural populations, with far-reaching implications for their food security.

The agriculture sectors are also a major contributor to the greenhouse gas emissions that cause global warming and associated climate change. The agriculture sectors are, therefore, also unique in their potential contribution to stabilizing the world’s climate, through better management of crops, land and livestock, in a way that reduces emissions and increases carbon sequestration in plant biomass and soils.

How climate change affects agriculture

In many regions, agricultural production is already being adversely affected by rising temperatures, increased temperature variability, changes in levels and frequency of precipitation, a greater frequency of dry spells and droughts, the increasing intensity of extreme weather events, rising sea levels, and the salinization of arable land and freshwater. As climate change impacts on agriculture intensify, it will become increasingly difficult to grow crops, raise animals, manage forests and catch fish in the same ways and in the same places as we have done in the past.

The crops that we grow for food, fibre and energy need specific conditions in order to thrive, including optimal temperature and sufficient water. Up to a certain point, warmer temperatures may benefit the growth of certain crops in some parts of the world. However, if temperatures exceed a crop’s optimal level, or if sufficient water and nutrients are not available, yields are likely to fall. An increased frequency of extreme events, especially floods and droughts, also harms crops and reduces yields. Dealing with drought could become a major challenge in areas where average temperatures are projected to increase and precipitation is projected to decrease. Many weeds, insect pests and diseases thrive under warmer temperatures, wetter climates and increased levels of atmospheric carbon dioxide (CO2). More extreme temperatures, combined with decreasing rainfall, can prevent crops from growing at all.

Heat waves, which are projected to become more common under climate change, directly threaten livestock. Over time, heat stress increases animals’ vulnerability to disease, thereby reducing fertility and meat and milk production. Climate change will also modify the prevalence of livestock parasites and diseases. In areas where rainfall increases, moisture-reliant pathogens are expected to thrive. Climate change also threatens the carrying capacity of grasslands and rangelands as well as feed production for non-grazing systems.

Fisheries and aquaculture – which provide at least 50 percent of animal protein to millions of people in low-income countries – are already under multiple stresses, including overfishing, habitat loss and water pollution (FAO, 2012). Climate change will exacerbate those stresses. Warmer water temperatures are likely to cause the extinction of some fish species, a shift in the habitat ranges of others, and increased risks of disease throughout the production chain. The world’s oceans are becoming more acidic owing to increases in levels of atmospheric CO2, with particularly severe consequences for fisheries depending on shellfish and squid, mangroves and coral reef systems. The increased frequency and intensity of storms, hurricanes and cyclones will harm aquaculture, mangroves and coastal fisheries.

Forests provide paid employment for more than 100 million people and support the livelihoods of many of the world’s rural poor. They are home to more than 80 percent of the world’s terrestrial biodiversity, and provide food, medicines, fuel and critical ecosystem services. Climate change and increased climate variability have both direct and indirect effects on forests and on the people who depend on them, and limit the capacity of forests to provide these crucial goods and services. While some forests will benefit from higher concentrations of atmospheric carbon dioxide, higher temperatures and changes in precipitation, most will experience losses of important species, a decline in yields and an increase in the frequency and intensity of storms and other disturbances (FAO, 2013).

While the precise impacts of climate change on agriculture are extremely difficult to predict, most studies indicate that they will change over time and will differ across locations. A review of studies conducted for the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) suggests that while positive and negative projections of impacts on crop yields counterbalance each other at global level until about 2030, the balance after that becomes increasingly negative (Porter et al., 2014; see also Chapter 2).

Impacts will also vary strongly across crops and regions. Figure 1 shows this variability in cereal yields projected for 2050 under different pathways of global warming; it assumes a “middle-of-the-road” pathway for economic and population growth as well as limited adaptation, and does not include “CO2 fertilization”, i.e. the stimulatory effect of increased levels of atmospheric carbon dioxide on plant growth. As their growing seasons lengthen, higher latitudes tend to see smaller yield losses, or even yield gains, for some crops, compared to those expected without climate change. Yield losses in lower latitude regions are generally greater. Maize yields would decline in most regions under most climate scenarios, with progressively greater losses under more extreme scenarios. While impacts on wheat yields are small at the global level, they are considerable in South Asia and sub-Saharan Africa.

How agriculture contributes to climate change

Agriculture is not only affected by climate change. It also contributes directly and indirectly to significant emissions of the three major greenhouse gases: carbon dioxide, methane and nitrous oxide. Annual anthropogenic GHG emissions that are classified in IPCC reports as originating in “agriculture, forestry and other land use” (AFOLU) are caused mainly by deforestation, livestock production and soil and nutrient management. They have been estimated at 21 percent of total global emissions (Figure 2). While this was less than the 27 percent recorded during the 1990s, the apparent reduction is due to the fact that emissions have grown more rapidly in other sectors.

Emissions from agriculture and those from net forest conversion contributed broadly comparable amounts of greenhouse gases in the 1990s; however, since the turn of the century, emissions from forest conversion have declined, while agricultural emissions have increased. Crop and livestock production, in particular, release significant amounts of methane and nitrous oxide, two potent GHGs. Methane is produced by ruminant livestock during digestion and also escapes from stored manure and organic waste. Nitrous oxide emissions are an indirect product of organic and mineral nitrogen fertilizers after they have been applied to cropland.

Unaccounted for in the AFOLU category are greenhouse gases that are produced in the pre- and post-production stages of modern food supply chains but classified in IPCC reporting as originating in other sectors, mainly industry, energy generation and transportation. They include the production of inputs such as synthetic fertilizers, which, unlike organic fertilizer production, is an energy intensive process; emissions resulting from fossil energy use (e.g. for powering farm machinery); and post-production transportation, processing and retailing (Smith et al., 2014). At every stage, food provisioning adds to the buildup of greenhouse gases in the atmosphere. If emissions caused by direct and indirect energy use by the agrifood chain were included, the AFOLU share of total greenhouse emissions would increase by one-third (FAO, 2011).

The contribution of food systems to total GHG emissions varies among countries and regions, according to the structure of local supply chains. Estimates by the Consultative Group for International Agricultural Research (CGIAR) indicate that in high-income countries emissions from the pre- and post-production stages equal those from production. In contrast, agricultural production is still the dominant stage in terms of GHG emissions in developing countries (Vermeulen, Campbell and Ingram, 2012).

The implications for food security

Through its impacts on agriculture, climate change will have negative effects on food security in all of its dimensions (Box 1). While food security will be affected through other channels – for example, by extreme weather events that reduce urban dwellers’ incomes and thus access to food – agriculture is a key channel through which climate change affects food security, and is the focus of this report.

Climate change affects food availability through its increasingly adverse impacts on crop yields, fish stocks and animal health and productivity, especially in sub-Saharan Africa and South Asia, where most of today’s food insecure live. It limits access to food through negative impacts on rural incomes and livelihoods. Along with a more volatile climate, there is expected to be an increase in the intensity and frequency of climate-related natural disasters. Poor people, including many smallholder farmers and agricultural workers, are more vulnerable to the impacts of such disasters. Severe droughts or floods can sharply reduce incomes and cause asset losses that erode future income earning capacity. In addition, to the extent that food supply is reduced by climate change, food prices will increase. Both urban and rural poor would be most affected, as they spend much higher shares of their income on food. Also affected will be poor smallholder family farmers, most of whom are net buyers of food (Zezza et al., 2008; World Bank, 2008; Porter et al., 2014).

Changes in the utilization of food will impact the nutrition status of the poor and vulnerable. For example, because higher temperatures favour the development of pathogens, and water scarcity affects water quality and hygiene habits, climate impacts could increase the burden of diarrhoea by up to 10 percent by 2030 in some regions. Again, the most severely affected would be the poor, and especially poor children (WHO, 2003). Climate change will affect nutrition status in many others ways, from reductions in caregiving and the nutrient content of staple food crops, to higher risk of food contamination (Box 2).

Finally, climate variability and a higher frequency and intensity of extreme events will affect the stability of food availability, access and utilization through changes in seasonality, more pronounced fluctuations in ecosystem productivity, increased supply risks and reduced supply predictability. This will be a major problem especially for landlocked countries and small island states, which are more vulnerable to both food supply disruptions and damage caused by extreme and climate events.

Climate change is just one of several drivers now shaping trends in poverty and food security. Those two trends, and the severity of climate change impacts on them, will be determined largely by future socio-economic development. A recent World Bank study (Hallegatte et al., 2016) estimated that, in the absence of economic growth, high impact climate change would increase the projected number of extremely poor in 2030 by 122 million people; in a scenario of prosperity, the increase would be just 16 million. In a similar exercise, using the International Model for Policy Analysis of Agricultural Commodities (IMPACT), developed by the International Food Policy Research Institute (IFPRI), it was estimated that by 2050 about 50 million more people could be at risk of undernourishment because of climate change.

However, the overall impact of climate change during the period up to 2050 is smaller than that of the other drivers, such as growth in population and incomes (see Chapter 2).

THE URGENCY OF CONCERTED GLOBAL ACTION NOW

All available evidence confirms that the climate is changing and that the changes are unlikely to be halted or reversed in the immediate future. There is also no doubt that climate change will affect the agriculture sectors and food security and that its negative impact will become more severe as it accelerates. In some particularly vulnerable places, such as small islands or in areas affected by large-scale extreme weather and climate events, the impact could be catastrophic.

Much will depend on the speed of climate change and the magnitude of its impacts. In a best-case scenario, changes would progress at a pace and magnitude that allow the agriculture sectors to adapt through relatively simple means, at least in the medium term. Declines in productivity, if any, would be relatively minor and gradual, with no or few instances of abrupt non-linear effects. In that case, impacts on food security globally would be modest.

A quite different, but plausible, scenario would see – even in the medium term – widespread instances of abrupt non-linear changes, making adequate adaptation by the agriculture sectors almost impossible in many locations, and causing drastic declines in productivity. The impacts on productivity would be, if not global, at least extremely widespread both geographically and in terms of the size of affected populations. The impacts on food security would be very significant. Supply shortfalls would lead to major increases in food prices, while increased climate variability would result in increased food price volatility. Climate variability would also affect the stability of rural household incomes in areas already subject to high variability in yields (Thornton et al., 2014). Productivity declines and losses of income would tend to be concentrated in some of the most food-insecure and vulnerable geographic areas and population groups. In the longer run, unless measures are put in place to halt and reverse climate change, food production could become impossible in large areas of the world.

Urgent action must be taken to address the potential impacts of climate change on agriculture and food security. Uncertainty does not justify delays in implementing climate change adaptation and mitigation. The urgency derives from two main concerns. Firstly, impacts of climate change are already evident, will become larger over time and could become very large indeed. Secondly, both drivers and responses to climate change involve long time lags. Today’s GHG emissions are pushing our planet towards irreversible global warming, with impacts that will be felt decades from now. These long-term risks are the main reason why the international community is committed to the goal of stabilizing the Earth’s climate.

Societies at large need to take decisive action, today, to mitigate climate change in order to avoid the risk of serious food insecurity. The possibility that climate change may make it impossible to feed humanity at some unknown, more or less distant, point in the future cannot be discarded. Even with a shorter time horizon, food security impacts in some locations may be severe. Agriculture and forestry have a large potential to reduce GHG emissions, but future food security will depend to a large extent on emission reductions achieved in other economic sectors. Changes will also be needed on the consumption side – reducing demand for emission- and resource-intensive food products will help to accelerate the transition towards sustainable agriculture, as well as promoting climate change mitigation.

At the same time, the agriculture sectors and the populations who depend on them need to adapt to current or expected climate changes, in a way that minimizes their harmful effects or takes advantage of the opportunities they may create. Resilience to climate change needs to be strengthened across biophysical, economic and social spheres, worldwide. To some degree, adaptation in agriculture will be a spontaneous response by farmers, fisherfolk and foresters; however, many of them, and especially small-scale producers, may face both a lack of feasible options and constraints to adopting appropriate solutions. An enabling environment that facilitates adaptation, therefore, is critical.

In the short term, adaptation at the level of the production unit or farm household, where possible, may be sufficient. However, longer-term adaptation is necessary in order to cope with the changes already “locked in” by past and ongoing increases in the concentration of greenhouse gases in the atmosphere. That will require more systemic changes, such as major shifts in the loci of production of specific products and species, compensated by changes in both trading and consumption patterns.

However, adaptation by itself is insufficient – mitigation is essential for ensuring the long-term food security of the world’s population. There is a fundamental difference between adaptation and mitigation and the incentives needed to promote them. Adaptation is something everyone will want to do in their own interest. Mitigation is something that has to be done together, in the interests of everyone. It is a global public good and a social responsibility to which the agriculture sectors must also contribute.

The urgency – and benefits – of a concerted and effective global response to climate change is underscored by the very significant differences in impacts between even small temperature increases. A recent meta-analysis has found that reductions in water availability and increases in the length of dry spells accelerate between 1.5 °C and 2 °C for several sub-tropical regions, particularly the Mediterranean, Central America, the Caribbean, South Africa and Australia. In tropical regions, agricultural production is projected to be strongly affected if temperature increases beyond 1.5 °C (Table 1), and even more so if other factors – such as nitrogen and phosphorus limitations or heat stress – constrain the positive effects of CO2 fertilization.

Under 2 °C warming, the risks posed by extreme heat to crop yields in tropical regions of Africa and South and Southeast Asia become particularly critical, given projected trends in their population growth. Other important benefits of limiting temperature increases to 1.5 °C include a significant reduction in areas of coral reefs at risk of severe degradation, and a 30 percent reduction in sea level rise (Schleussner et al., 2016). In fact, a key message of the UNFCCC’s structured expert dialogue, concluded in 2015, was that an increase in the global temperature1 of 2 °C above pre-industrial levels is “an upper limit, a defence line that needs to be stringently defended, while less warming would be preferable” (UNFCCC, 2015). The IPCC will present in 2017 the findings of an assessment of the differences between 2 °C and 1.5 °C scenarios.

The UNFCCC’s Paris Agreement of December 2015 has set the long-term goal of holding the increase in global average temperature to “well below 2 °C” above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5 °C, recognizing that this would significantly reduce the risks and impacts of climate change. The IPCC reports that scenarios consistent with keeping temperature increase below 2 °C include substantial cuts in anthropogenic GHG emissions by mid-century, through large-scale changes in energy systems and, potentially, in land use. Scenarios that do not exceed the 2 °C limit set global GHG emission levels in 2050 at 40 to 70 percent lower than those in 2010, and near zero or below in 2100 (IPCC, 2014). If the growth in agriculture that is needed to ensure world food security in the future is attained with emissions growth similar to that of the recent past, the goal of keeping global temperature increase under 2 °C will be very difficult to achieve (see also, Searchinger et al., 2015; Wollenberg et al., 2016).

Decisions taken today will determine the kind of world we will live in 15 years from now, and beyond. The agriculture sectors must respond, therefore, by building resilience to the impacts of climate change, while contributing to the extent possible to mitigation efforts. Responses must be designed in line with the national development objectives and priorities of different countries, and must not in themselves jeopardize efforts to reduce food insecurity. In this context, it is important to note that, unlike other economic sectors where adaptation and mitigation actions are generally independent of each other, in the agriculture sectors there are synergies – but also a need to accept trade-offs – among the objectives of food security, adaptation and mitigation.

THE SPECIAL ROLE AND RESPONSIBILITY OF AGRICULTURE

An agricultural response to climate change

Implementing an effective, sustained response to climate change in agriculture – in terms of both adaptation and mitigation – will be far more difficult than in most, if not all, other sectors, owing to its dependence on biophysical processes and the enormous range of agro-ecological and socio-economic conditions. A further complicating factor is the large number of actors involved – hundreds of millions of farmers, fisherfolk and forest-dependent populations, many of whom are poorly linked to markets, information and public services. This diversity calls for different and often extremely context-specific solutions. The agriculture sectors are likely, therefore, to be slower than others in adjusting, and a significant degree of inertia in the system is to be expected. This only adds to the urgency of taking action now.

The vulnerability of agriculture to climate change has not always received the attention it deserves. Assessments of climate change impacts, using mainly global economic models, have tended to overlook the impacts on agriculture because of its declining contribution, globally, to gross domestic product (GDP). Today, the importance of an agriculture response to climate change is widely recognized. This awareness is reflected clearly in the Intended Nationally Determined Contributions (INDCs) submitted by countries in the lead-up to the 21st Conference of Parties to the UNFCCC in Paris in 2015 (Box 3). The INDCs are discussed in more detail in Chapter 5.

There is also increasing recognition that agriculture has a special role to play in climate change mitigation. Scenarios indicate that limiting the global temperature increase to 2 °C can only be achieved by reducing GHG emissions from energy, industry and transport to zero, and limiting emissions from agriculture, land use and land-use change. The agriculture sectors can contribute to mitigation, first, by reducing their emission intensity (or the quantity of emissions per unit of product), and avoiding the further loss of carbon stored principally in forests and soil. This effort can be complemented by actions aimed at reducing food losses and waste, and changing food consumption patterns. In addition, the agriculture sectors have a unique potential to act as carbon sinks, which capture carbon dioxide and sequester carbon in biomass and soils, through forestry and land restoration (see Chapter 4).

A key challenge in framing climate change responses is to ensure that they do not jeopardize food security or progress in poverty reduction, particularly in countries with persistent, high levels of hunger and poverty. This is recognized in the preamble to the UNFCCC, which affirms that “responses to climate change should be coordinated with social and economic development in an integrated manner with a view to avoiding adverse impacts on the latter, taking into full account the legitimate priority needs of developing countries for the achievement of sustained economic growth and the eradication of poverty” (UNFCCC, 1992). Similarly, the preamble to the Paris Agreement, concluded in December 2015, recognizes “the fundamental priority of safeguarding food security and ending hunger, and particular vulnerabilities of food production systems to the adverse impacts of climate change” (UNFCCC, 2015).

Climate-smart agriculture

The responses to climate change that are to be applied in different countries must be seen in the broader context of sustainable agricultural development, and will reflect countries’ individual priorities for achieving it. The FAO approach to sustainable food and agriculture recognizes that countries will pursue multiple objectives across the economic, social and environmental dimensions of sustainability, and will need to balance trade-offs between objectives and between short-term and long-term needs (Box 4). Such trade-offs will differ among countries, depending on natural resource endowments, socio-economic characteristics, political systems and stages of development. Similarly, countries will have different priorities, according to their specific circumstances, which need to be taken into account when designing climate change responses.

More specifically for managing agriculture for food security under the changing realities of global warming, FAO has developed the “climate-smart agriculture” (CSA) approach, which it presented in 2010 at The Hague Conference on Agriculture, Food Security and Climate Change (FAO, 2010). The principles of CSA implicitly underpin and guide this report as well as the responses to climate change envisaged for the food and agriculture sectors.

The CSA approach has three objectives: sustainably increasing agricultural productivity to support equitable increases in incomes, food security and development; increasing adaptive capacity and resilience to shocks at multiple levels, from farm to national; and reducing greenhouse gas emissions and increasing carbon sequestration where possible.

Since local conditions vary, an essential feature of CSA is to identify the impacts of agricultural intensification strategies on food security, adaptation and mitigation in specific locations. This is particularly important in developing countries, where agricultural growth is generally a top priority. Often, but not always, practices with strong adaptation and food security benefits can also lead to reduced GHG emissions or increased carbon sequestration. However, implementation of these synergistic practices may entail higher costs, particularly for up-front financing. Therefore, CSA programmes include capacity development for local stakeholders to assist them in tapping into sources of funding for agricultural and climate-related investment. Not every practice applied in every location will, can or even should generate “triple wins”; but all three objectives must be considered in order to arrive at locally acceptable solutions that reflect local or national priorities.

The point of departure for the CSA analysis is the technologies and practices that countries have already prioritized in their agricultural policy and planning. Information on recent and near-term projected climate change trends is used to assess the food security and adaptation potential of these technologies and practices under site-specific climate change conditions, and to determine what adjustments may be needed. Examples of such adjustments include: modifying planting times and adopting varieties resistant to heat and drought; developing new cultivars; changing the farm portfolio of crops and livestock; improving soil and water management practices, including conservation agriculture; integrating the use of climate forecasts into cropping decisions; expanding the use of irrigation; increasing regional farm diversity; and shifting to non-farm livelihood sources (Asfaw et al., 2014; Branca et al., 2011; FAO, 2010; FAO, 2013).

Since the introduction of climate-smart agriculture, there has been growing support at international and national levels for adoption of the approach. In their INDCs, more than 30 countries, most prominently in sub-Saharan Africa, specifically refer to CSA (see Chapter 5).

STRUCTURE OF THIS REPORT

This year’s edition of The State of Food and Agriculture explores in-depth the relationships between climate change, agriculture and food security and describes how the agriculture sectors can respond effectively to climate change through both adaptation and mitigation. The whole food supply chain, from producer to consumer, is affected by – and contributes to – climate change, sometimes to a larger extent than primary agriculture itself. However, the main focus of this report will be on the primary agriculture sectors: crops, livestock, fisheries and forestry. The remainder of this report is organized as follows:

CHAPTER 2 reviews the empirical evidence of the current and expected future impacts of climate change on the agriculture sectors, food security and nutrition in different parts of the world under different global warming scenarios. It further assesses how and to what extent current agricultural production and food systems are contributing to climate change.

CHAPTER 3 looks at the special challenge of adaptation to climate change in small-scale family farming and small-scale production systems. It suggests feasible pathways for farm households and others dependent on such systems to build greater resilience through adaptation and diversification strategies that also improve their livelihoods and, therefore, contribute to ending hunger and rural poverty.

CHAPTER 4 discusses how the agriculture sectors can respond to climate change to the benefit of both food security and climate stabilization. Key responses aim at reducing emission-intensity in agriculture and food systems, and maximizing co-benefits from adaptation and mitigation efforts, through better management of carbon and nitrogen cycles, increased resource-use efficiency, the conservation of carbon-rich landscapes, measures to strengthen resilience and – on the demand side – a reduction in food losses and improvements in diets.

CHAPTER 5 discusses the design of policies to ensure an effective climate change response by governments and agricultural sector stakeholders.

CHAPTER 6 presents ways of leveraging climate finance – and, more broadly, development finance – to support adaptation and mitigation objectives in agriculture.

KEY MESSAGES

1UNTIL ABOUT 2030, GLOBAL WARMING IS EXPECTED TO LEAD TO BOTH GAINS AND LOSSES in the productivity of crops, livestock, fisheries and forestry, depending on places and conditions.

2BEYOND 2030, THE NEGATIVE IMPACTS OF CLIMATE CHANGE ON AGRICULTURAL YIELDS will become increasingly severe in all regions.

3IN TROPICAL DEVELOPING REGIONS, adverse impacts are already affecting the livelihoods and food security of vulnerable households and communities.

4BECAUSE AGRICULTURE, LAND-USE AND FORESTRY make a considerable contribution to greenhouse gas emissions, they have significant mitigation potential.

This chapter examines in detail the linkages between climate change, agriculture and food security. It discusses the biophysical impacts of climate change on the agriculture sectors and how they translate into socio-economic impacts with consequences for food security and nutrition. It also reviews how greenhouse gas emissions and removals from the agriculture sectors contribute to climate change. The implication is that the agriculture sectors need to both adapt to climate change by building resilience and contribute to climate change mitigation.

CASCADING IMPACTS FROM CLIMATE TO PEOPLE

The IPCC’s Fifth Assessment Report confirms the main findings of its previous reports on the evolution of the world’s climate, the expected changes – such as increases in temperature, rainfall variability and extreme weather events – and the main biophysical impacts of global warming, such as sea-level rise, ocean acidification, reductions in the extent of glaciers, the degradation of ecosystems, increased risks of fires and insect pest upsurges. As well as providing a better understanding of potential changes in precipitation, the report uses improvements in modelling and data collection to make better medium-term projections. Accordingly, the cascading impacts of climate change can now be attributed along chains of evidence from physical climate through to intermediate systems and then to people (Kirtman et al., 2014).

Climate change profoundly affects the conditions under which agricultural activities are conducted. In every region of the world, plants, animals and ecosystems have adapted to prevailing climatic conditions. As those conditions change, they will be affected in ways that are difficult to predict precisely. Several studies document the biophysical impacts of the expected changes specifically on agroecosystems (Box 5). The impacts range from yield reductions and increased yield variability to displacement of crops and the loss of agrobiodiversity and ecosystem services. Most, but not all, of the impacts of climate change on agriculture are expected to be negative. All the agriculture sectors – crops, livestock, fisheries and forestry – will be affected in different ways.

Climate change already affects the agriculture sectors in many parts of the world, and its impacts will be amplified in the years and decades ahead. A large body of evidence points to a prevalence of negative outcomes, with many agricultural systems becoming less productive and some plant and animal species disappearing. Those changes will have direct effects on agricultural production, which will have economic and social consequences and finally impacts on food security (Figure 3). The impacts will be transmitted through different channels and will affect food security in all four of its dimensions: access, availability, utilization and stability. At each stage of the transmission chain, the severity of impact will be determined by both the shock itself and by the vulnerability of the system or population group under stress (FAO, 2016a).

IMPACTS ON AGRICULTURE

Climate change affects the agriculture sectors in a multitude of ways, which vary from region to region (Table 2). For example, it increases temperature and precipitation variability, reduces the predictability of seasonal weather patterns and increases the frequency and intensity of severe weather-related events such as floods, cyclones and hurricanes. Some regions are expected to face prolonged drought and water shortages. The widespread melting of glaciers and snow cover in major mountain ranges, particularly in Asia, will affect the volume and timing of water flows, ultimately reducing the availability of irrigation water downstream. Increasing temperatures lead to changes in the location and incidence of pest and disease outbreaks. Even slight warming will decrease yields in low-latitude regions. Greater frequency and intensity of extreme weather events, such as the El Niño-Southern Oscillation, will increasingly affect climate patterns and food production (Box 6).

Crops

Climate change impacts on the yields of major crops is probably the food security related issue on which there are the most studies. A wide literature on observed and projected impacts on yields includes more than two decades of work since the global assessment by Rosenzweig and Parry (1994) of the potential impact of climate change on world food supply; some other key studies are Parry, Rosenzweig and Livermore (2005), Cline (2007), World Bank (2010), and Rosenzweig et al. (2014). Most studies are limited to major crops, and the effects of climate change on many other important crops are much less known.

The observed effects of past climate trends on crop production are evident in several regions of the world (Porter et al., 2014), with negative impacts being more common than positive ones. There is evidence that climate change has already negatively affected wheat and maize yields. Widely cited estimates show that over the period 1980 to 2008 there was a 5.5 percent drop in wheat yields and a 3.8 percent drop in maize yields globally, compared to what they would have been had climate remained stable (Lobell, Schlenker and Costa-Roberts, 2011).

The precise future effects of climate change on crop yields are very difficult to predict and will depend on many parameters. These include: physical ones, such as temperature, precipitation patterns and CO2 fertilization; changes in agroecosystems (e.g. through loss of pollinators and increased incidence of pest and diseases); and the adaptive responses of human systems. Effects of temperature changes are generally well understood up to the optimum temperature for crop development; however, beyond these optimum temperatures, effects are much less known. Recent results have confirmed the damaging effects of elevated tropospheric ozone on yields, with estimates of losses for soybean, wheat and maize in 2000 ranging from 8.5 to 14 percent, 3.9 to 15 percent, and 2.2 to 5.5 percent respectively (Porter et al., 2014). Several other possible impacts of climate change on the functioning of ecosystems – such as the balance between crops and pests, and effects on pollinators – are difficult to assess and are generally not taken into account by the models used to make projections of crop yields.

Within certain limits, a changing climate could have both positive and negative effects on crops. Indeed, increases in temperatures and levels of carbon dioxide in the atmosphere may be beneficial for some crops in some places. Yields of wheat and soybeans, for example, could increase with increased CO2 concentrations under optimal temperatures. However, while projections of future yields vary according to the scenario, model and time-scale used, there is consistency in the main expected directions of change: yields suffer more in tropical regions than at higher latitudes and impacts are more severe with increased warming (Porter et al., 2014).

Importantly, the IPCC Fifth Assessment Report provides new evidence that crop yields are expected to decline in areas that already suffer food insecurity. It presents projected estimates of changes in crop yields owing to climate change over the 21st century (Figure 4). The data used include results from 91 studies with 1 722 estimates of changes in crop yields by Challinor et al., 2014. There are wide variations among the studies, in terms of time-frame, crop coverage, crop and climate models, and emission levels. Some studies include the effects of adaptation measures, but others do not. The scales and geographical coverage also vary, with some estimates being for localities while others are national, regional or global.

In spite of the heterogeneity of the studies, their long-term projections clearly point to a prevalence of negative outcomes. They show that in the medium term – that is, until about 2030 – the positive and negative effects on yields could offset each other at the global level, the balance after this date would be increasingly negative as climate change accelerates. The data also show that projected impacts of climate change on yields of maize, wheat and rice in the second half of the 21st century are more often negative for tropical regions than for temperate regions. However, in many locations in temperate regions, as well, crop yields may decrease (Porter et al., 2014 and Challinor et al., 2014).

Further analysis of the same data, undertaken by FAO for this report, reveals quite distinct patterns for developing and developed countries. For the developing countries, most estimates for crop yield impacts are negative, with the share of negative estimates increasing the further into the future the study projects (Figure 5). Compared with developing countries, estimates for developed countries show a much larger share of potential positive changes (Figure 6).2

Other estimates of the impact of climate change on crop yields are provided by the recent consolidated study conducted in the framework of the Agricultural Model Intercomparison and Improvement Project (AgMIP) and the Inter-Sectoral Impact Model Intercomparison Project. Both point to dramatic long-term impacts, compared to a world without climate change and in the absence of climate change mitigation.3 The impact on yields by the year 2100 under high-emission climate scenarios ranges between -20 and -45 percent for maize, between -5 and -50 percent for wheat, between -20 and -30 percent for rice, and between -30 and -60 percent for soybean (Rosenzweig et al., 2013). Assuming the full effectiveness of CO2 fertilization, climate change impacts on yields are reduced to a range of between -10 and -35 percent for maize, between +5 and -15 percent for wheat, between -5 and -20 percent for rice, and between 0 and -30 percent for soybean. If limits on access to nitrogen are explicitly considered, crops benefit less from CO 2 fertilization and negative climate impacts are amplified (Müller and Elliott, 2015).

Livestock

Climate change affects livestock production in multiple ways, both directly and indirectly (Table 2). The most important impacts are on animal productivity, animal health and biodiversity, the quality and amount of feed supply, and the carrying capacity of pastures. Increasing variability in rainfall leads to shortages of drinking water, an increased incidence of livestock pests and diseases, and changes in their distribution and transmission. It also affects the species composition of pastures, pasture yields and forage quality.

Higher temperatures cause heat stress in animals, which has a range of negative impacts: reduced feed intake and productivity, lower rates of reproduction and higher mortality rates. Heat stress also lowers animals’ resistance to pathogens, parasites and vectors (Thornton et al., 2009; Niang et al., 2014). Multiple stressors greatly affect animal production, reproduction and immune status. Research in India found that a combination of climate-related stresses on sheep – for example, excessive heat and lower nutritional intake – had severe impacts on the animals’ biological coping mechanisms (Sejian et al., 2012).

The effects of higher temperatures may be reduced in intensive cattle, pig and poultry production units, through climate control (Thornton et al., 2009), provided appropriate housing and energy are available. However, projected drier conditions in the extensive rangelands of southern Africa would increase water scarcity; in Botswana, the costs of pumping water from boreholes increases 23 percent by 2050. In the Near East, declining forage quality, soil erosion and water scarcity will most likely be exacerbated in the semi-arid rangelands (Turral, Burke and Faurès, 2011).

Impacts of climate change on animal health are also documented, especially for vector-borne diseases, with rising temperatures favouring the winter survival of vectors and pathogens. In Europe, global warming is likely to increase sheep tick activity, and the risk of tick-borne diseases, in the autumn and winter months (Gray et al., 2009). Outbreaks of Rift Valley fever in East Africa are associated with increased rainfall and flooding due to El Niño-Southern Oscillation events (Lancelot, de La Rocque and Chevalier, 2008; Rosenthal, 2009; Porter et al., 2014).

Fisheries and aquaculture

Climate change, climate variability and extreme weather events compound threats to the sustainability of capture fisheries and aquaculture in marine and freshwater environments (Table 2). Small-scale fisheries in tropical, less developed and economically poor regions are particularly vulnerable to climate change impacts (Porter et al., 2014). Fisheries and aquaculture systems are likely to suffer from higher impacts such as water temperatures, oxygen deficit, sea-level rise, decreased pH and changes in productivity patterns.

Various fish species are already migrating towards the poles. Models based on predicted changes in environmental conditions, habitat types and phytoplankton primary production forecast a large-scale redistribution of global marine fish catch potential, with an average 30 to 70 percent increase in high-latitude regions and a drop of up to 40 percent in the tropics (Cheung et al., 2010).The production from inland fisheries and aquaculture is threatened by changes in precipitation and water management, increased stress on freshwater resources, and the frequency and intensity of extreme climate events (Brander, 2007; Porter et al., 2014).

Coral reef systems, which sustain one out of four marine species, will be at increased risk owing to the dual pressure of rising temperatures and ocean acidification. Sea surface temperature fluctuations caused mass coral bleaching and mortality around Kiribati’s Phoenix Islands in 2002–2003, leading to a decline in coral cover of about 60 percent (Alling et al., 2007; Obura and Mangubhai, 2011). In October 2015, the United States National Oceanic and Atmospheric Administration declared the third global coral reef bleaching event; the previous two took place in 1998 and 2010. These global shocks, brought on by climate change, and coupled with events such as the El Niño phenomenon are the largest and most pervasive threats to coral reefs around the world (NOAA, 2015).

Forestry

Climate change and climate variability threaten the provision of a range of crucial goods and environmental services from forests (Table 2). They include the delivery of a clean and reliable water supply, protection against landslides, erosion and land degradation, provision or enhancement of the habitats of aquatic and terrestrial animals, provision of a range of wood and non-wood products for household use or sale, and the generation of employment.

Recent studies suggest that, in a wide range of forest systems, higher temperatures and changes in precipitation are increasing tree mortality through heat stress, drought stress and pest outbreaks (Allen et al., 2010). Many areas of boreal forests have experienced biomass productivity declines that have been attributed to warming-induced drought (Williams et al., 2013). Warming and drying, coupled with productivity decline, insect disturbance and associated tree mortality, also favour greater fire disturbance (Settele et al., 2014).

The overall trend for temperate forests has until recently been an increase in growth rates, due to a combination of increases in the length of the growing season, higher atmospheric CO2 and nitrogen deposition, and forest management (Ciais et al., 2008). Models predict that the potential climatic space for most tree species will shift towards higher latitudes and altitudes, at a faster rate than natural migration.

For tropical forests, a key uncertainty is the impact of direct CO2 effects on photosynthesis and transpiration. Moist tropical forests have many species that are vulnerable to drought- and fire-induced mortality. In addition, there is evidence that in many forests, including those of the Amazon, forest fire frequency and severity are increasing, due to a combination of land use change and drought. Climate change, deforestation, fragmentation, fire and human pressure place virtually all dry tropical forests at risk of replacement or degradation (Miles et al., 2006). In Southeast Asia, increased inter-annual variability in forest fires owing to El Niño-induced droughts increases health risks, and the loss of biodiversity and ecosystem services (Marlier et al., 2013).

IMPACTS ON INCOMES AND LIVELIHOODS

The effect of climate change on the production and productivity of the agriculture sectors will translate into mostly negative economic and social impacts, with implications for all four dimensions of food security. Climate change can reduce incomes at both the household and national levels. Given the high dependency on agriculture of hundreds of millions of poor and food-insecure rural people, the potential impacts on agricultural incomes – with economy-wide ramifications in low-income countries that are highly dependent on agriculture – are a major concern. By exacerbating poverty, climate change would have severe negative repercussions on food security.

Much uncertainty surrounds the future evolution of climate change, its precise impacts and the possible responses. The implications for the environment and society depend not only on the response of the Earth system to changes in atmospheric composition, but also on the forces driving those changes and on human responses, such as changes in technology, economies and lifestyle.

Assessing climate change impacts on agriculture requires integrated use of climate, crop, and economic models to take into account the reaction to changing conditions in the sector, including management decisions, land-use choices, international trade and prices, as well as consumers. For this reason, the climate research community has developed over the past two decades sets of scenarios that describe plausible future trajectories and represent many of the major driving forces that are important for informing climate change policy.

A variety of those scenarios have been used to analyse the impacts of climate change on agroecosystems, the agriculture sectors, socio-economic trends and ultimately food security. In order to ensure a better and more consistent analysis of future climate and its impacts, the IPCC’s Fifth Assessment Report adopted a set of Representative Concentration Pathways (RCPs), which are hypothetical climate scenarios based on the magnitude of global annual greenhouse gas emissions. The IPCC also helped catalyse the development of Shared Socio-economic Pathways (SSPs), which describe alternative development futures, to be used alongside the RCPs to analyse feedback between climate change and socio-economic factors (Box 7).

Nelson et al. (2014a) have designed a common protocol to compare results of a set of nine climate, crop, and economic models under the scenario RCP 8.5 (global annual GHG emissions continuing to rise throughout the 21st century), without accounting for CO2 fertilization of crops. The authors compare the effects of the exogenous climate change shock on yields of four crop aggregates – coarse grains, oil seeds, wheat and rice – which account for about 70 percent of the global crop harvested area. The mean biophysical effect of the climate change shock on yields is a 17 percent decline. The economic models transfer the shock effect to the response variables. Producers respond to the price increases associated with the shock by both intensifying management practices, which leads to a final mean yield change of -11 percent, and increasing the cropping area by a mean of 11 percent.

The combined yield decline and area increase result in a mean decline in production of only 2 percent. Consumption declines slightly, with a mean decline of 3 percent. Changes in trade shares cancel out across regions, but the share of global trade in world production increases by 1 percent on average. Average producer prices increase by 20 percent. The direction of responses is common to all models, but the magnitude of responses varies significantly across models, crops and regions. Although the average consumption decline is relatively small, the price increases caused by the inelastic nature of global demand are likely to increase food costs significantly for the poor.

The key role of agriculture in supporting the livelihoods of the majority of the world’s poor, and their particular vulnerability to climate change, was confirmed in a World Bank study, which compared worst-case and more optimistic scenarios with a scenario of no climate change (Hallegatte et al., 2015). A scenario with high-impact climate change, rapid population growth and a stagnant economy indicated that an additional 122 million people would be living in extreme poverty by 2030 (Table 3). With the same level of climate change impacts, but with universal access to basic services, reduced inequality and extreme poverty affecting less than 3 percent of the world’s population, the number of additional poor is projected to be just 16 million (Rozenberg and Hallegatte, 2015). Under the worst-case scenario, much of the forecast increase in the number of poor occurs in Africa (43 million) and South Asia (62 million). Reduced income in the agricultural sector explains the largest share of increased poverty as a result of climate change. This is because the most severe reductions in food production and increases in food prices occur in Africa and India, which account for a large share of the world’s poor. The second most important factor leading to increased poverty is health impacts, followed by the impacts of higher temperatures on labour productivity.

Recent FAO studies of adaptation to climate changes in smallholder agriculture systems in sub-Saharan Africa show how dry spells, the late onset of rains and high temperatures affect incomes at the farm level.4 In all cases, climate shocks reduced productivity or harvest value significantly and, in turn, reduced access to food. The shocks impinge on physical capital, when assets are destroyed – for example, through the death of livestock – or when farmers are forced to sell productive capital, such as cattle, to absorb the income shock. They also reduce farmers’ capacity to invest, with negative consequences for future food security.

Bárcena et al. (2014) summarized the results of a series of studies of the projected impacts of climate change on agricultural revenues in South America. While there is a wide degree of variation among models and scenarios, projected impacts are generally found to be negative across a wide range of locations. Table 4 shows selected results from countries in South America as well as for the region as a whole.

At the national level, reduced production due to climate change can trigger an increase in the prices of food and feed, negatively affecting the socio-economic status of the whole population and its food security. Such impacts are particularly critical in countries where an important part of the household budget is spent on food. They can be accompanied by major macro-economic effects where agriculture makes an important contribution to national GDP and/or employment.

Lam et al. (2012) modelled the economic and social implications of climate-change induced modifications in the availability of marine fisheries species in 14 countries in West Africa, by 2050. Using the high range IPCC Special Report on Emission Scenarios (SRES) A1B scenario, they project a decrease in landed fish value of 21 percent, a total annual loss of US$311 million compared to values for 2000, and a loss in fisheries-related jobs of almost 50 percent, with Côte d’Ivoire, Ghana, Liberia, Nigeria, Sierra Leone and Togo suffering the most severe impacts.

Most projections of the food price impacts of climate change point to increases, although the magnitude and locations vary considerably across models and climate scenarios. A study that coupled scenarios for population growth and income growth with climate change scenarios looked at the potential impacts under 15 different combinations. Using an optimistic scenario of low population growth and high income growth, and the mean results from four climate change scenarios, it plotted mean projected price increases by 2050, compared to 2010 levels, of 87 percent for maize, 31 percent for rice and 44 percent for wheat (Nelson et al., 2010). Another potential impact of climate change is food price volatility (Porter et al., 2014), although the extent of volatility is greatly influenced by domestic policies, such as export bans and other trade restricting measures that exacerbate price fluctuations on international markets.

Increased trade is expected to play an important role in adjusting to the shifts in agricultural and food production patterns resulting from climate change (Nelson et al., 2010; Chomo and De Young, 2015).The adaptive role of trade is addressed in a study by Valenzuela and Anderson (2011), which finds that climate change could cause a substantial decline in the food self-sufficiency ratio of developing countries of about 12 percent by 2050. While trade can help in adaptation to climate change and to shifting international patterns of production, ultimately global markets will only be accessible to those countries and segments of population that have sufficient purchasing power. This makes inclusive economic growth an essential precondition for stable food security.

Climate change may also lead to changes in investment patterns that would lead to reductions in the long-term productivity and resilience of agricultural systems at household and national levels. Uncertainty discourages investment in agricultural production, potentially offsetting the benefit to food producers of higher prices. This is particularly true for poor smallholders with limited or no access to credit and insurance. Greater exposure to risk, in the absence of well-functioning insurance markets, can lead to greater emphasis on low-risk/low-return subsistence crops, a lower likelihood of applying purchased inputs such as fertilizer and adopting new technologies, and reduced levels of investment (Antle and Crissman, 1990; Dercon and Christiaensen, 2011; Fafchamps, 1992; Feder, Just and Zilberman, 1985; Heltberg and Tarp, 2002; Kassie et al., 2008; Roe and Graham-Tomasi, 1986; Sadoulet and de Janvry, 1995; Skees, Hazell and Miranda, 1999). All of these responses generally lead to both lower current and future farm profits (Hurley, 2010; Rosenzweig and Binswanger, 1993).

MILLIONS MORE AT RISK OF HUNGER

Although climate change poses concrete threats to future food security, the likely impacts will differ by region, country and location and will affect different population groups according to their vulnerability. Future food security trends will also be influenced by overall socio-economic conditions, which, in turn, have implications for the vulnerability of countries and populations around the world.

The IPCC’s Fourth Assessment Report estimated that, depending on the climate change scenario and socio-economic development path, from 34 million to 600 million more people could suffer from hunger by 2080 (Yohe et al., 2007; Parry, Rosenzweig and Livermore, 2005). Arnell et al. (2002) projected that, with no climate change, 312 million people globally would be at risk of hunger in the 2050s, and 300 million people in the 2080s. Without climate change mitigation, those numbers would grow to 321 million in the 2050s and 391 million in the 2080s. Among the developing regions, Southern Asia and Africa would be the most exposed to an increased risk of hunger as a result of climate change. The very broad range of estimates of the number of people at risk of hunger owing to climate change points to uncertainties concerning some of the processes, both biophysical and socio-economic; however, the numbers indicate that the impact should not be underestimated.

When analysing the possible future impact of climate change on food security, it is important to bear in mind that food and agriculture will be affected by a range of other drivers of change, including growth in population and income. This is illustrated by an analysis of climate change impacts based on 15 scenarios – three economic development and five climate change scenarios combined – which found that up to 2050, economic growth will have a much greater effect on global food security than climate change, although climate change does aggravate negative impacts (Nelson et al., 2009).

The International Food Policy Research Institute (IFPRI) and several other global economic modelling groups, collaborating as part of the Agricultural Model Intercomparison and Improvement Project, and building on the earlier work by Nelson et al. (2014b), used different combinations of RCPs and SSPs to explore the possible effects of climate change – together with other socio-economic changes – on production, yields, cultivated area, prices and trade of major crops (Wiebe et al., 2015).

The results show that by 2050, relative to a world with no climate change, global average crop yields will decline by between 5 and 7 percent, depending on assumptions about rates of socio-economic and climate change, while the area harvested will increase by around 4 percent (Figure 7). The impact of climate change on total production will be relatively small. However, both the area harvested and staple food prices will increase at about twice the rate projected in the absence of climate change, with potentially significant impacts on both the environment and food security.

Impacts will vary according to crop and region and rate of climate change. Higher latitudes will see smaller losses in yields, and even some gains as growing seasons lengthen. Losses in lower latitude regions will be greater. Maize yields decline in most regions under most scenarios. Impacts on wheat are small at the global level, since losses in South Asia and sub-Saharan Africa are offset by increases elsewhere (see Figure 1).

In a related analysis, IFPRI found that in the absence of climate change, most regions would see declining numbers of people at risk of hunger between 2010 and 2050. However, climate change will partly offset those gains. Results from IFPRI’s IMPACT model suggest that, by the year 2050, under a high emissions scenario (RCP 8.5), more than 40 million more people could be at risk of undernourishment than there would be in the absence of climate change. While the increase due to climate change is smaller than the projected global reduction in the number of undernourished, thanks to economic growth and development, it is a significant number. It is also likely to be a conservative estimate because it is based on the SSP2 “business-as-usual” assumption of economic growth, and does not account for the impacts of extreme events, sea-level rise, melting glaciers, changes in pest and disease patterns, and other factors that are expected to change with climate, especially after 2050.

Under the RCP 8.5 high emissions scenario, most of the expected slow-down in the reduction in the number of people at risk of hunger is in sub-Saharan Africa (Figure 8). The loss is concentrated in that region partly because other regions benefit from some production in higher latitude areas, and partly because other regions are less reliant on agriculture for incomes and food security.

However, it must be remembered that climate change is not the only driver of future trends in poverty and food insecurity. How climate change is projected to affect the global risk of hunger over time, for a range of climate change impacts and the SSP2 “middle-of-the-road” socio-economic scenario, is shown in Figure 9. The declining trend in the number of undernourished with or without climate change indicates that the overall impact of climate change during the period until 2050 is smaller than that of the other drivers embedded in the socio-economic scenario, particularly income growth. In the absence of climate change, most regions are projected to see declining numbers of people at risk of hunger. These improvements are partially reduced by climate change, especially in sub-Saharan Africa.

The vulnerability of populations in sub-Saharan Africa, as well as in parts of South Asia, to food insecurity resulting from climate change also emerges in projections by the World Food Programme and the Met Office Hadley Centre (United Kingdom). Their joint work largely follows methods used by Krishnamurthy, Lewis and Choularton (2014), with vulnerability defined by a composite index based on measures of exposure, sensitivity and adaptive capacity. Projections of future levels of vulnerability were made for two time periods: 2050 and 2080. Three climate change scenarios were considered: low emissions (RCP 2.6), medium emissions (RCP 4.5) and high emissions (RCP 8.5). Each scenario was projected using twelve different climate models, and the median result was taken as the value for the respective drought and flood indicators. Scenarios of no adaptation as well as low and high adaptation were taken into consideration.

Figure 10 illustrates vulnerability today and in 2050 under two different scenarios: a worst case scenario, with high emissions (RCP 8.5) and no adaptation, and a best case scenario with low emissions (RCP 2.6) and high levels of adaptation. The greatest vulnerabilities are seen in areas of sub-Saharan Africa and South and South East Asia, where millions of people are likely to face greater risk of food insecurity as a result of climate change by the 2050s. The increase in vulnerability is dramatic under the worst-case scenario. Under a best case scenario, vulnerabilities are greatly reduced, and for some countries actually decrease from present-day levels.

THE AGRICULTURE SECTORSROLE IN CLIMATE CHANGE

By FAO estimates (Table 5), emissions from agriculture, forest and other land use (AFOLU) stood at 10.6 gigatonnes (Gt) of carbon dioxide equivalent in the year 2014. The sector emits three types of anthropogenic greenhouse gases: carbon dioxide (CO2), the hydrocarbon methane (CH4) and nitrous oxide (N2O). The main sources of those emissions are deforestation, enteric fermentation in livestock, manure left on fields, applied chemical fertilizers and rice cultivation practices. Deforestation and land degradation have also reduced the sector’s capacity to absorb (or sequester) carbon dioxide from the atmosphere. Carbon dioxide and methane account for 49 and 30 percent, respectively, of the emissions generated by agriculture, forestry and land use. This represents 14 percent of total anthropogenic emissions of carbon dioxide and 42 percent of all methane emissions. The share of nitrous oxide in total AFOLU emissions is small, but accounts for as much as 75 percent of global anthropogenic emissions of the gas.

Agriculture accounts for the largest share of emissions from AFOLU, followed by net conversion of forest land; since the 1990s, emissions from forest conversion have decreased while agricultural emissions have increased (Figure 11). Organic soils (those with a high concentration of organic matter, such as peatlands) and the burning of biomass (e.g. savanna fires) account for relatively smaller amounts of emissions. Forests also mitigate climate change by removing GHG from the atmosphere through forest growth, as seen in the negative values. However, the average contribution of forests to carbon sequestration has fallen from 2.8 Gt annually in the 1990s to 2.3 Gt in the 2000s, and is estimated at 1.8 Gt in 2014.

Across regions, AFOLU emission levels and sources are starkly different (Figure 12). Emissions from net forest conversion represent the largest share of GHG emissions in Latin America and the Caribbean and sub-Saharan Africa, but are less significant in other regions. The contribution of forest sinks is important in countries in developed regions as well as in Latin America and the Caribbean, but less so elsewhere. Agricultural emissions make up a significant share of total AFOLU emissions in all regions, and represent more than half of emissions in all regions except sub-Saharan Africa and Latin America and the Caribbean, where net forest conversion is the major source. Different emission patterns have been recorded at regional level over the last two decades. For example, there has been a sharp reduction in the positive contribution of forest sinks in Southeast, Eastern and Southern Asia, and an opposite trend in Europe. Other regions report more stable trends (FAO, 2016d).

Of the sources of specific GHG emissions from agriculture, the most significant contribution at the global level – amounting to 40 percent in CO2 equivalent – comes from enteric fermentation in ruminants, which is a major source of methane emissions (Figure 13). In terms of the magnitude of emissions, this is followed by manure left on pasture (16 percent), the use of synthetic fertilizers (12 percent) and rice cultivation (10 percent).

Enteric fermentation is the largest source of emissions from agriculture in all regions except Oceania and Eastern and Southeast Asia, with the share of total emissions ranging from 58 percent in Latin America and the Caribbean to 37 percent in countries in developed regions (Table 6). The importance of other emission sources varies at regional level. Rice cultivation is the most important source of agricultural emissions in Eastern and Southeast Asia (at 26 percent), while in Oceania the cultivation of organic soils is the source of 59 percent of agricultural emissions. The second main source is manure left on pastures in sub-Saharan Africa, Northern Africa and Western Asia, and Latin America and the Caribbean; rice cultivation in Southern Asia; and synthetic fertilizers in countries in developed regions.

Agriculture must contribute to mitigation if global temperature increase is to be kept below 2 °C^^ (Wollenberg et al., 2016). It needs to be recognized, however, that the source of some 75 percent of global GHG emissions is fossil fuel used for energy production, while only 21 percent is linked to the agriculture sectors. Emissions from the energy sector could be reduced, even to zero, through greater energy use efficiency and a transition to renewable energy sources. If that were to happen, emissions from agriculture would represent a progressively larger part of total emissions, for three reasons: (1) because emissions from other sectors would decrease; (2) because food production is increasing and, with it, the tendency towards higher emissions; and (3) because reducing agriculture’s emissions is far more challenging owing to the enormous diversity in its sectors and the complex biophysical processes involved.

The agriculture sectors can contribute to climate change mitigation by decoupling emissions increases from production increases. However, they also have the unique capacity to sequester carbon. At the present state of technology, one of the main means of extracting CO2 from the atmosphere is through forestry and the rehabilitation of degraded land. Transforming this theoretical potential into an actual sink depends on biophysical conditions, as well as on the available technical options and appropriate institutions and policies. Emissions from agriculture, as well as sinks, are part of the global carbon and nitrogen cycles. Optimizing the mitigation potential of the agriculture sectors requires, therefore, an understanding of these cycles and of how agricultural activities interact with them. Some – but not all – of the options for enhanced mitigation also carry co-benefits in terms of adaptation (see Chapter 4).

CONCLUSIONS

This chapter has traced the potential impacts of climate change on agriculture, socio-economic development and, ultimately, food security. Among the main impacts on agriculture are the increased incidence of drought and extreme weather events, more intense pest and disease pressures and the loss of biodiversity. Long-term projections point to negative effects on food production that will become increasingly severe after 2030. Reductions in crop yields and the productivity of livestock, fisheries and forestry are more likely in tropical developing regions than in temperate, developed countries.

As the impact of climate change on agricultural production and productivity deepens, an increase in both international food prices and the number of people at risk of food insecurity is expected. While socioeconomic and technological development will be a stronger driver of food security trends than climate change until 2050, climate change impacts on agriculture and food security should not be underestimated, especially at the regional level – the socio-economic knock-on effects will be felt most by low-income rural populations and by countries with a high dependency on agriculture.

The following chapter examines how the agriculture sectors can adapt to current or expected changes, in a way that minimizes their harmful effects and takes advantage of opportunities, with a focus on smallholders and small-scale production systems. The potential for climate change mitigation and the potential co-benefits of adaptation and mitigation measures will be addressed in Chapter 4.

KEY MESSAGES

1GLOBAL POVERTY CANNOT BE ERADICATED WITHOUT STRENGTHENING the resilience of smallholder agriculture to climate change impacts.

2SMALLHOLDER AGRICULTURAL SYSTEMS CAN ADAPT TO CLIMATE CHANGE by adopting climate-smart practices, diversifying on-farm agricultural production and diversifying into off-farm income and employment.

3SUSTAINABLE MANAGEMENT OF NATURAL RESOURCES will be key for adaptation to climate change and to ensure food security.

4IMPROVEMENTS IN INFRASTRUCTURE, EXTENSION, CLIMATE INFORMATION, MARKET ACCESS, CREDIT AND SOCIAL INSURANCE are needed to facilitate adaptation and diversification of smallholder livelihoods.

5THE COSTS OF INACTION ARE MUCH GREATER THAN THE COSTS OF THE INTERVENTIONS that would enable farmers, fisherfolk, herders and foresters to respond effectively to climate change.

Most of the world’s poor and hungry are rural people who earn meagre livings from agriculture. In 2010, some 900 million of the estimated 1.2 billion extremely poor lived in rural areas. About 750 million of them worked in agriculture, usually as smallholder family farmers (Olinto et al., 2013). While 200 million rural poor may migrate to towns and cities over the next 15 years, most will remain in the countryside. In that period, the rural population in less developed regions is projected to increase slightly (UN-DESA, 2012), and an estimated 700 million rural people would be living in poverty. Without concerted action to improve rural livelihoods, the eradication of poverty by 2030 will be impossible.

The sheer number of smallholder farm families worldwide justifies a specific focus on the threats posed by climate change to their livelihoods and the urgent need to transform those livelihoods along sustainable pathways. This chapter explores the key vulnerabilities of smallholder farming systems to climate change risks, and assesses the options for minimizing vulnerabilities through sustainable intensification, diversification and risk management strategies. After assessing the available evidence of the cost of adaptation, it concludes that the costs of inaction exceed by far the cost of interventions that would make smallholder farming systems resilient, sustainable and more prosperous.

RETHINKING PATHWAYS OUT OF POVERTY

Eliminating rural poverty is essential to eradicating hunger and poverty globally. Over recent decades, poverty reduction across a wide range of countries and conditions has been associated with growth in the value of agricultural production, increased rural-urban migration and a shift away from economies highly dependent on agriculture to more diversified sources of income and employment. In every country that has seen rapid poverty reduction, growth in agricultural labour productivity, and consequently rural wages, has been a feature (Timmer, 2014). Rwanda and Ethiopia, for example, have achieved very significant productivity growth and correspondingly large reductions in rural poverty.

However, the opportunities and challenges for agricultural productivity growth today are markedly different from those of the past. Growth in markets for food and agricultural products creates opportunities for smallholders, but sometimes also barriers which lead to their exclusion. Growth in the private sector’s share of agricultural technology development and dissemination has opened up new opportunities but has also changed the terms under which those technologies are accessed.

Facing different constraints and opportunities, rural populations across the world have different possible pathways out of poverty (Wiggins, 2016). Those with good linkages to rapidly expanding markets have a different set of opportunities to those in more remote areas. Demography also matters. In sub-Saharan Africa, the future agricultural population will be young, with smaller areas of land to farm; in parts of Asia, the population is likely to be older and farm sizes bigger. In some cases, farmland consolidation will be needed to facilitate access to high value market chains (Masters et al., 2013). Other possible pathways are diversification into non-farm sources of income through migration of some household members, or a full exit from agriculture and one-way migration to cities (Wiggins, 2016). For smallholders, the feasibility of any of these strategies depends on their location and the level of economic development in the non-farm and agriculture sectors.

Climate change is projected to have mainly negative impacts on food and agricultural production in large areas of the developing world. The success of efforts to develop rural economies and eradicate rural poverty will also depend crucially, therefore, on building resilience to climate change in agricultural systems – especially those managed by smallholders – and the widespread adoption of land, water, fisheries and forestry management practices that are environmentally, socially and economically sustainable.

KEY VULNERABILITIES TO CLIMATE CHANGE RISKS

Smallholder agriculture producers in developing countries are considered to be highly vulnerable to climate change and stand to gain the most from increased resilience. Vulnerability is defined by the IPCC as the extent to which a natural or social system is susceptible to sustaining damage from climate change impacts, and is a function of exposure, sensitivity and adaptive capacity (IPCC, 2001).

Chapter 2 summarized the nature of climate change risks to agricultural systems globally. Overall, the extent of exposure to risks is diverse and changes over time. For most developing countries, the impacts of climate change on crop and livestock productivity tend to be adverse and increasing. Localized weather shocks and emerging pests and diseases are already compromising the stability of crop production, highlighting the urgent need for immediate, adaptable management responses (FAO, 2016a).

Recent FAO studies on the impact of climate shocks on smallholder agriculture in sub-Saharan Africa (summarized in Table 7) found that yields rise significantly with more rainfall in most cases, but suffer when rainfall is below average and more variable; likewise, above-average temperatures reduce productivity significantly. However, specific weather anomalies affect yields in some countries but not in others. Knowing what weather variables constrain yields is the first step to addressing such constraints, and there is no recipe that applies across countries. Rainfall variability is highly significant in Malawi and Niger, but not in Uganda and Zambia. Although average rainfall and temperatures appear to be significant across a broader set of countries, variability can be a key constraining factor in some regions, even if it is not associated with an extreme event.

The consequences of exposure to climate hazards depend on sensitivity, i.e. the degree to which an agro-ecological or socio-economic system responds, both positively and negatively, to a given change. Increasing scarcity and degradation of natural resources heighten the sensitivity of smallholder agriculture to climate hazards, because degraded resources are less capable of maintaining productivity under climate stresses (FAO, 2012). For example, while there is sufficient water to satisfy the demand for food at the global level, an increasing number of regions face growing water scarcity, which will impact rural and urban livelihoods, food security and economic activities (FAO, 2011a; FAO and World Water Council, 2015). Further degradation of water quality and quantity under climate change reduces the supply of water for food production, affecting food availability, stability, access and utilization, especially in the arid and semi-arid tropics and in Asian and African mega-deltas (Bates et al., 2008). Rationalizing water use in agriculture will greatly facilitate adaptation to climate change in smallholder production systems.

Rural women are especially sensitive to climate hazards, owing to their gender-determined household responsibilities (such as collecting wood and water) and the increasing agricultural workloads they bear because of male out-migration (see e.g. Jost et al., 2015; Agwu and Okhimamwe, 2009; Goh, 2012; Wright and Chandani, 2014). Increases in the incidence of drought and water shortages add to their workloads, affecting both agricultural productivity and household welfare (UNDP, 2010). See also Box 8.

The limited capacity of smallholders to manage risks is another source of sensitivity to climate hazards. During extreme events, they adopt precautionary strategies – for example, selling cattle – which may protect them against catastrophic losses but undermine long-term livelihood opportunities and can trap them in chronic poverty (Carter and Barrett, 2006; Dercon, 1996; Dercon and Christiaensen, 2007; Fafchamps, 2003; Morduch, 1994; Kebede, 1992; Simtowe, 2006). Climate uncertainties and risk aversion also impact rural financial markets and supply chains in ways that further reduce opportunities and deepen farm-level poverty traps (Barrett and Swallow, 2006; Kelly, Adesina and Gordon, 2003; Poulton, Kydd and Dorward, 2006).

In smallholder agriculture, adaptive capacity – or the ability to identify and implement effective actions in response to changing circumstances – is limited by barriers to the adoption of improved, climate-smart technologies and practices. For example, the lack of access to credit for investment affects, particularly, the poorest households, which are usually unable to provide collateral for loans, and female producers, who often have no formal title to assets. Other barriers include lack of land tenure security, very limited access to information, extension advice and markets, a lack of safety nets to protect livelihoods against shocks, and gender-bias in all of those institutions.

Most of the interventions needed to improve smallholders’ capacity to adapt to climate change are the same as those required for general rural development, but with a stronger focus on climate risks. For example, extension packages need to take into account site-specific climate change projections; investments in the breeding of improved crop varieties and animal breeds should consider not only high yield but also resistance to shocks expected in specific locations (Box 9). Investments are urgently needed in irrigation and other water management infrastructure. These issues are taken up in more detail in the following sections.

TOWARDS RESILIENT PRODUCTION SYSTEMS AND LIVELIHOODS

The vulnerability of smallholders to climate change adds to the more general difficulties they face in enhancing their productivity and improving their livelihoods. Consequently, responses aimed at reducing vulnerability need to go hand in hand with policies for broader agricultural and rural development. Such an approach creates conditions that help to reduce exposure and sensitivity to weather shocks, while building adaptive capacity in ways that can provide new opportunities for improving rural livelihoods and food security.

Resilient livelihoods imply conditions, such as adequate income and food security, which allow people to withstand, recover from and adapt to the climate risks they are exposed to. Since smallholders’ circumstances and opportunities differ greatly across locations, pathways for adaptation and building resilience must be designed specifically for each context, taking into account the degree of exposure to climate shocks as well as adaptation capacity. This section identifies the main features of possible pathways to reduced vulnerability to climate change for smallholder systems and the populations that depend on them. It addresses two dimensions: ways to increase the resilience of agricultural production systems and ways to enhance the resilience of vulnerable populations’ livelihoods.

Innovation: the key to farming system adaptation

Addressing the new challenges posed by climate change will require innovations in farming systems. Innovation happens when individuals and groups adopt new ideas, technologies or processes which, when successful, spread through communities and societies. The process is complex, involving many actors, and it cannot function in a vacuum. It is furthered by the presence of an effective innovation system. An agricultural innovation system includes the general enabling, economic and institutional environment required by all farmers. Other key components are research and advisory services and effective agricultural producers’ organizations. Innovation often builds on and adjusts local knowledge and traditional systems, in combination with new sources of knowledge from formal research systems (FAO, 2014a).

Innovations that strengthen the resilience of smallholder farming systems to climate change include enhanced resource-use efficiency through sustainable intensification of production, and the adoption of agroecological production systems. Improving water resource management is another area where innovation can be effective in addressing climate change impacts. All of these approaches improve carbon and nitrogen management (see below and Chapter 4).

Biotechnologies, both low- and high-tech, can help small-scale producers in particular to be more resilient and to adapt better to climate change. While the subsections that follow focus mainly on innovation through management practices, some practices may depend on the outcomes of biotechnology, such as improved seed.

Sustainable intensification

Sustainable intensification raises productivity, lowers production costs and increases the level and stability of returns from production, while conserving natural resources, reducing negative impacts on the environment and enhancing the flow of ecosystem services (FAO, 2011b). The nature of sustainable intensification strategies varies across different types of farming systems and locations. However, one of the core principles is increasing the efficiency of resource use.

FAO’s approach to sustainable crop production intensification is the “Save and Grow” model. Save and Grow promotes a productive agriculture that conserves and enhances natural resources. It uses an ecosystem approach that draws on nature’s contribution to crop growth, such as soil organic matter, water flow regulation, pollination and natural predation of pests. It applies appropriate external inputs at the right time and in the right amount to improved crop varieties that are resilient to climate change and use nutrients, water and external inputs more efficiently. Increasing resource use efficiency, cutting the use of fossil fuels and reducing direct environmental degradation are key components of the approach, saving money for farmers and preventing the negative effects of overusing particular inputs. This approach has been extended to other agriculture sectors.

Through better management of carbon and nitrogen cycles (see below), sustainable agricultural intensification also builds greater resilience to climate change impacts and contributes to reducing GHG emissions (Burney et al., 2010; Wollenberg et al., 2016).

Agroecology

According to HLPE (2016), agroecology applies ecological concepts and principles to farming systems. Through its focus on the interactions between plants, animals, humans and the environment, it fosters sustainable agricultural development, which in turn ensures food security and nutrition. Agroecology goes beyond input use efficiency and input substitution by: harnessing key ecological processes, such as natural pest predation and the recycling of biomass and nutrients; enhancing beneficial biological interactions and synergies among the components of agrobiodiversity; and optimizing the use of resources. Agroecological principles, as defined by Nicholls, Altieri and Vazquez (2016), are of particular relevance to climate change adaptation, as they aim to:

enhance the recycling of biomass, with a view to optimizing organic matter decomposition and nutrient cycling;

strengthen the “immune system” of agricultural systems through the enhancement of functional biodiversity, e.g. by creating habitats for natural enemies of pests;

provide the most favourable soil conditions for plant growth, particularly by managing organic matter and by enhancing soil biological activity;

minimize losses of energy, water, nutrients and genetic resources by enhancing conservation and regeneration of soil and water resources and agrobiodiversity;

diversify species and genetic resources in the agroecosystem over time and space, at the field and landscape level; and

enhance biological interactions and synergies among the components of agrobiodiversity, thereby promoting key ecological processes and services.

Agroecology builds on the local and traditional knowledge of farmers to create solutions based on farmers’ needs. For example, Swiderska (2011) found that access to diverse traditional crop varieties was essential for climate change adaptation and survival among poor farmers in China, Bolivia and Kenya. In China, farmers who grew four different mixtures of rice varieties suffered 44 percent less blast incidence and achieved 89 percent higher yields, when compared to single-variety fields, and without the need to use fungicides (Zhu et al., 2000). Agroecological diversification contributes to yield stability under climatic variability. Polycultures exhibit greater yield stability and suffer fewer productivity declines during a drought than monocultures (Altieri et al., 2015).

Efficient water management

As climate change alters rainfall and water availability patterns, the capacity to deal with water scarcity or water excess will be crucial in efforts to sustainably improve productivity. The areas with the highest potential for water productivity improvements are those with a high incidence of poverty, including many parts of sub-Saharan Africa, South Asia and Latin America, as well as areas where competition for water is intense, such as the Indus Basin and Yellow River (HLPE, 2015).

Increasing water use efficiency in agricultural systems under climate change may require action in the fields of policy, investment and water management, and institutional and technical changes applied at different scales: on fields and farms, in irrigation schemes, in watersheds or aquifers, in river basins and at the national level (FAO, 2013a). As a first step towards adaptation to longer-term climate change impacts, information about current climate variability needs to be incorporated into water management (Sadoff and Muller, 2009; Bates et al., 2008 as cited in Pinca, 2016).

In rainfed systems, which account for 95 percent of farmland in sub-Saharan Africa, better management of rainwater and soil moisture is the key to raising productivity and reducing yield losses during dry spells and periods of variable rainfall. Supplemental irrigation, using water harvesting or shallow groundwater resources, is an important but underused strategy for increasing water productivity in rainfed agriculture (HLPE 2015; Oweis, 2014).

In irrigated systems, water use efficiency can be promoted through institutional changes, such as the creation of water users’ associations, and infrastructural improvements, such as lining canals, more efficient drainage networks and wastewater reuse. Water-efficient irrigation technologies, such as drip emitters, and better maintenance of irrigation infrastructure, combined with appropriate training to build farmers’ technical knowledge, can be effective in dealing with climate change impacts on water availability and food security (Box 10). However, some technologies that improve water use efficiency, such as drip irrigation, require energy. More broadly, there are often trade-offs and possible synergies in the use of water, energy and land for food production. The “water-energy-food nexus” approach is a useful concept when planning the use of these resources in agrifood chains (FAO, 2014b).

Carbon and nitrogen management options

The Earth’s carbon and nitrogen cycles are affected by the types of soil, nutrient and water management practices farmers adopt, by the extent of agro-forestry practised, and by the expansion of agriculture onto non-agricultural land (see also Chapter 4). Smallholders, in particular, can benefit from practices that help restore soil productivity in areas where unsustainable land management has depleted soil organic carbon, natural soil fertility and soil quality, resulting in reduced productivity and increased vulnerability to climate hazards such as drought, flooding, and conditions that favour pests and diseases (Stocking, 2003; Lal, 2004; Cassman, 1999; FAO, 2007).

On cropland, levels of soil organic carbon (SOC) and plant-useable soil nitrogen can be improved through the adoption of practices such as agroforestry, improved fallows, green manuring, nitrogen-fixing cover crops, integrated nutrient management, minimum soil disturbance and the retention of crop residues. On grazing lands, improved pasture management, reducing or eliminating the occurrence of fires, and introducing improved fodder grasses or legumes are important means of improving carbon management. Mixed farming systems enhance resilience and reverse soil degradation by controlling erosion, providing nitrogen-rich residues and increasing soil organic matter. For example, drought-tolerant mixed farming systems practised in Ethiopia and the United Republic of Tanzania include a multipurpose legume, such as pigeon pea (Cajanus cajan), and Faidherbia albida, an indigenous nitrogen-fixing leguminous tree which provides pods palatable to livestock and leaves used as organic fertilizer. Higher production of pulses helps to diversify diets and provides extra protein during periods of seasonal food insecurity.

Context-specific climatic conditions will influence smallholders’ choice of the carbon and nitrogen management options that are the most effective in improving their livelihood. For example, the application of mineral fertilizer may generate higher yields under average climatic conditions, but lower yields under conditions of high rainfall variability or the delayed onset of rainfall. Conversely, crop rotation may produce lower yields under average climatic conditions, but higher yields and a lower probability of yield loss under conditions of high rainfall variability (Table 8).

Improvements in the use of nitrogen fertilizer are critical to the sustainability of many smallholder farming systems. Indicators of nitrogen fertilizer use show that application rates and cereal yields are much higher in East Asia, but the additional amount of production obtained from fertilizer input is significantly higher in sub-Saharan Africa (Table 9). Also significantly higher is the partial nutrient balance – in sub-Saharan Africa, more nutrients are removed with the harvested crop than applied in fertilizer or manure, indicating unsustainable soil nutrient depletion. In East Asia, the opposite is the case.

Overuse of mineral fertilizer is clearly a problem in East Asia, where the excess input provides no benefit; on the contrary, it is causing severe environmental harm, in the form of ground and surface water contamination, and greenhouse gas emissions. In East Asia, therefore, reducing mineral fertilizer use and ensuring the correct amount, timing and placement is an important part of sustainable intensification.

In sub-Saharan Africa, on the other hand, increasing the level of mineral fertilizer use, up to appropriate amounts, has considerable potential for boosting smallholder crop yields. However, given the generally poor condition of soils in much of the region, smallholders need support in improving soil quality and soil ecosystem services, as a complement to judicious fertilizer application.

Improved carbon and nitrogen management are also important for fishery and forestry systems. Box 11 presents an example from Viet Nam, where carbon management measures were introduced as part of an integrated climate-smart aquaculture system.

Food security benefits of improved farming practices

Significant improvements in food security can be achieved with the introduction of improved agricultural practices. Simulations using IFPRI’s IMPACT model show that the adoption of heat-tolerant crop varieties produces the highest projected global yield increase for maize in 2050. Varieties that use nitrogen more efficiently produce the highest global yield increase for rice, while zero-tillage is the best option for wheat (Rosegrant et al., 2014; De Pinto, Thomas and Wiebe, 2016).

Adopting these technologies would have significant positive impacts on food security by increasing the availability of food energy, enhancing smallholders’ incomes and lowering food prices. The number of people at risk of undernourishment in developing countries would be reduced in 20505 by 12 percent (or almost 124 million people) if nitrogen-efficient crop varieties were widely used, by 9 percent (or 91 million people) if zero-tillage were more widely adopted, and by 8 percent (80 million people) if heat-tolerant crop varieties or precision agriculture were adopted (Figure 14).

The results assume standalone introduction of the indicated practices, and that the practices are adapted to the specific socio-economic and agro-ecological contexts where adoption is projected to occur. Under the climate-smart agriculture approach, an evidence base is developed to identify practices that are actually adapted to the local context. They are not determined a priori but based on a process of building evidence and dialogue. There is no standard list of climate smart agriculture practices that can be universally applied: in some cases zero-till agriculture does provide significant adaptation benefits, while in others it does not (Arslan et al., 2015). It is also important to recognize that there is a wide range of combinations of practices that farmers may adopt to suit their specific needs.

In many contexts, it makes sense to combine the set of improved practices by “stacking” one on top of the other in the same order as crop production activities (i.e., first improvements in land preparation, planting and crop management, followed by irrigation, etc.). Model projections indicate that the benefits to food security are greater – up to three times greater than that which can be obtained from the improved use of nitrogen alone – when a combined set of improved practices is adopted, compared with the benefits of a single practice (Rosegrant et. al., 2014).

Four strategies to build livelihood resilience

Diversification

Diversification is an important means of climate change adaptation because it helps to spread the risk of climatic variability damaging livelihoods. First, a distinction should be made between agricultural diversification and livelihoods diversification (Thornton and Lipper, 2014). Agricultural diversification means adding plant varieties and species, or animal breeds, to farms or farming communities. It may involve landscape diversification, with different crops and cropping systems being interspersed in space and time. Livelihood diversification means farming households engaging in multiple agricultural and non-agricultural activities – for example, by combining on-farm activities with seasonal agricultural work elsewhere, taking a job in the city, processing farm products or opening a shop. Both agricultural and livelihood diversification are ways of managing climate risk.

Since climate shocks affect different farming and non-farming activities differently, diversification can potentially reduce the impact of these shocks on income, and provide a broader range of options for managing future risks. When combined with risk-mitigating measures, such as crop insurance or social protection, diversification can lead to higher incomes and help accelerate poverty reduction. However, if farmers diversify to low-productivity activities, it may actually reduce average income, force households to sell off assets in the event of shocks, and trigger a vicious cycle of greater vulnerability and exposure to risk (Dercon, 1996). The scope of crop diversification as a means of mitigating climate risks may be limited where the risks affect equally different varieties of crops (Barrett, Reardon, and Webb, 2001). However, crop diversification may still be an option, where farm conditions are neither so marginal that they limit diversification nor sufficiently optimal for a single high-return crop (Kandulu et al., 2012).

Faced with climate variability, farm households engage in different diversification strategies, depending on the nature of their exposure and the performance of institutions. For instance, when rainfall is more variable, farmers seek alternative sources of income and employment in Malawi, but diversify into livestock in Zambia (Box 12). Where weather risks are high, many households in sub-Saharan Africa favour mixed livestock-crop systems, using their livestock as an asset to smooth income fluctuations (Herrero et al., 2010 and 2013; Baudron et al., 2013). Mixed farming systems provide, via manure amendments, about 15 percent of the nitrogen inputs used in crop production, which reduces input costs and achieves an emission intensity substantially lower than that of many grazing systems (Liu et al., 2010; Herrero et al., 2013). In addition, diversified farms can play an important role in maintaining and increasing the provision of ecosystem services, which helps to increase overall resilience (Ricketts, 2001; Kremen and Miles, 2012).

Support to risk management

Social protection programmes, which are a critical tool for poverty alleviation, may also play an important role in helping smallholders to manage risk under climate change. Social protection takes various forms, from cash transfers to school meals and public works. Agricultural input subsidies may also have a social protection function by helping to reduce the vulnerability of smallholders to price volatility. Evidence from Latin America and sub-Saharan Africa shows the clear benefits of social protection in terms of food security, human capital development, and economic and productive capacity, even among the poorest and most marginalized.

By ensuring predictability and regularity, social protection instruments enable households to better manage risks and engage in more profitable livelihood and agricultural activities. When directed towards women, they are not only empowering, but improve households’ overall welfare thanks to women’s priorities of food and nutrition security and children’s wellbeing. Social protection programmes also have an important impact on the agricultural investment decisions of rural households and thus have a longer-term positive impact on access to food (FAO, 2015c).

In Zambia, households in areas that experienced lower than average rainfall had lower levels of daily caloric intake as well as lower food and non-food expenditures. This effect was most pronounced in the poorest households. Thanks to a cash transfer programme aimed at 20 000 ultra-poor households, they suffered much less from weather shocks. However, while participation in the cash grants programme helped mitigate the negative effects of climate shocks on food security, it was not sufficient to fully overcome them. It is important to ensure, therefore, that social protection programmes are aligned with other forms of climate risk management, including disaster risk reduction (Asfaw et al., 2016b).

Existing social protection programmes rarely take climate risk into account. In order to fill this gap, several humanitarian and development stakeholders, including FAO, are helping national governments set up risk-informed and shock-responsive social protection systems, which provide support ahead of a crisis, based on economic and climate risk-related criteria (UNEP, 2016; Winder Rossi et al., 2016). If effectively linked to early warning systems and informed by agricultural, food security and nutritional parameters, social protection systems can also be used to plan a timely response to emergencies (FAO, 2016a).

Implementation of the approach outlined above is achieved through the scaling-up of interventions that provide cash and short-cycle productive assets, accompanied by technical training. Where markets function and currency is stable, cash transfers have the advantages of cost-effectiveness, impact and flexibility, and give beneficiary households greater choice. Nevertheless, in 2015, cash transfers and vouchers accounted for only 6 percent of humanitarian aid (ODI, 2015). Enhancing the potential of cash-based interventions requires integrating cash in preparedness and contingency planning, strengthening partnerships with the private sector, using e-payments and digital transfers, and – when possible – leveraging cash transfers to build medium and long-term social assistance structures that can be used in recurrent emergencies.

Entry points and operational linkages between social protection and climate change policies are multiple. Public works programmes, including productive safety nets, can be designed to simultaneously contribute to increasing household incomes, engaging communities in climate-smart agriculture, and generating “green jobs” in areas such as waste management, reforestation and soil conservation (Asfaw and Lipper, 2016). Index-based insurance, which pays out benefits on the basis of indices such as rainfall, area-average yields and vegetation conditions measured by satellites, is being tested as a risk-mitigation tool in several countries. When an index exceeds a predetermined threshold, farmers receive a quick pay-out, delivered in some cases via mobile phones. However, index-based insurance by itself does not provide a full solution to climate-related risk. For example, India’s Weather-Based Crop Insurance Scheme may have prompted a shift among participants towards more profitable but higher risk farm production systems, thanks to subsidized premiums (Cole et al., 2013). Uptake of index-based insurance has been generally limited because it usually involves high transaction costs. Another problem is a lack of trust in insurance institutions.

Better information about weather conditions would help small-scale producers to adapt to foreseeable variations in climate by, for example, adjusting planting dates or timely sheltering of livestock. Surveys have found that farmers in Eastern and Southern Africa who were able to access seasonal forecasts changed at least some management decisions, which helped them to reduce harvest losses (O’Brien et al., 2000; Ngugi, Mureithi and Kamande, 2011; Phillips, Makaudze, and Unganai, 2001, 2002; Klopper and Bartman, 2003; Mudombi and Nhamo, 2014). Access to climate-forecast information helped farmers in Kenya to avoid losses equivalent to as much as a quarter of their average net income (Erickson et al., 2011). Farmers with access to information and communications technology tend to routinely use available climate information (Ramussen et al., 2014). Investing in institutions that share seasonal forecasts, a key area of climate information, can increase farmers’ capacity to reduce their exposure to risks (Hansen et al., 2011). Likewise, for disaster relief agencies, overcoming institutional barriers to the use of seasonal forecasts has proved critical to saving lives during climate crises (Tall et al., 2012).

Reducing gender inequalities

Because men and women have different priorities and capacities in responding to climate change, policy-makers and institutions need to explicitly recognize gender differentials in designing interventions that strengthen the resilience of rural livelihoods (Acosta et al., 2015; Gumucio and Tafur-Rueda, 2015). Social norms often impose agricultural responsibilities and limit women’s choices, which determine the type of information they need and the information channels they can access (Archer and Yamashita, 2003; McOmber et al., 2013; Jost et al., 2015). For example, information about the timing of rainfall onset is important for male farmers in Senegal because men have priority access to animals for field preparation; women lack the capacity to act on the information, and prefer forecasts of rainfall cessation and dry periods (Tall et al., 2014).

The Kenya Agricultural Carbon Project, implemented by Vi Agroforestry and the World Bank, highlights several strategies that address gender disparities in land and tree tenure, labour, knowledge, benefit sharing, participation and leadership. Examples include: contracts signed by groups, including women even though they do not own land; investments in training designed to reach women (e.g. hiring female community facilitators); the provision of seedlings of tree species usually desired by women (e.g. species that provide fuelwood, fodder, shade and fruit); rotating leadership systems and rules; and improvements in women’s access to loans and insurance (World Bank, 2010a; Vi Agroforestry 2015; Shames et al., 2012). A participatory project in the water-stressed Kumbharwadi community, in Maharashtra state, India, reduced the amount of time women spent collecting drinking water and fuelwood by installing sources for both nearer to their homes, and helped to increase women’s participation in village decision-making processes. The project resulted in an increase in the incomes of poor households (Gray and Srinidhi, 2013; World Bank, FAO and IFAD, 2015).

Migration

Environmental and climate stresses on livelihoods – such as droughts, floods and unpredictable weather patterns – push rural people to migrate. As land is farmed more intensively, soil degradation increases, production declines, and incomes fall. Likewise, water scarcity caused by prolonged drought and conflicts over water use may induce poorer farmers to abandon the land. Temporary, seasonal and permanent migration can be a form of livelihood diversification, which provides significant benefits to many rural households. It is a key source of income diversification that boosts household resilience and provides the means for productivity-enhancing investments. On the downside, migrants often face multiple hardships, risks and dangers.

One study projects that hundreds of millions of people might need to flee their homes as a result of climatic and environmental pressures between now and 2050 (IIED, 2010). Such forecasts have helped to place migration as an issue to be addressed in climate change adaptation. In their adaptation strategies, governments tend to take one of two approaches (KNOMAD, 2014). The first, and most common, sees adaptation as a way of reducing migration pressures and allowing people to remain where they are by improving agricultural practices and infrastructure. In the second view, migration is itself an adaptation strategy, which alleviates population pressure on fragile areas. Of particular interest to development policy-makers is the potential of migrants already living outside of vulnerable areas to help their home communities adapt and respond to climate change.

Social protection and active labour market policies can play important roles in mitigating many of the risks associated with migration. Better quality education and training would enhance the employment prospects of rural people who decide to migrate, especially youth, and of those who seek more skill-intensive employment in sustainable agriculture. Provision of suitable transport and communications infrastructure, either directly by the public sector or by promoting private investment, will be important in bringing down the costs associated with both travel and sending remittances, as well as facilitating flows of information on employment and business opportunities.

HOW MUCH WILL ADAPTATION COST?

How much will it actually cost to build the capacity of smallholder producers to adapt to climate change? That question arises often, particularly in the context of developing new sources of climate finance. A review of literature on the costs and benefits (to the entire economy) of adaptation to climate change identified more than 500 papers on the topic (Watkiss, 2015). Estimates vary for many reasons, including differences in regional coverage, climate change scenarios, methods and models, as well as in the time period, adaptation measures and sectors that were considered. Various global studies suggest that the costs of inaction far outweigh the costs of adaptation to climate change (Stern, 2007; OECD, 2012; Stern 2014; OECD, 2015). Some country-level analyses provide estimates of the costs of inaction side by side with costs of adaptation. Here we consider two such studies in developing countries, where a large share of farmers are smallholders, as well as a study initiated by FAO focusing specifically on smallholders in four countries (Box 13).

A study from Uganda estimates the economic impacts of climate change on agriculture, water, energy and infrastructure as ranging from a cumulative US$273 billion to US$437 billion between 2010 and 2050, depending on assumptions about socio-economic development and the severity of climate change (Markandya, Cabot-Venton and Beucher, 2015). Considering solely the agriculture sector, the costs of inaction, in terms of reduced crop and livestock production as well as reductions in exports, amount to between US$22 billion and US$38 billion in the same period. While the budget for adaptation, including more efficient irrigation systems, improved crop varieties, more adapted and productive livestock breeds, and credit facilities, could reach almost US$644 million annually by 2025, the cost of inaction would be up to 46 times higher.

A case study for Viet Nam likewise shows that the economic costs of climate change are likely to be far higher than the costs of adaptation (World Bank, 2010c). Although adaptation will not prevent economic losses as a result of climate change, it will significantly reduce their magnitude. Without adaptation, agricultural losses due to climate change are estimated at about US$2 billion per year. Even with adaptation, some losses are likely, but they will be limited to about US$500 million, thus reducing total losses by about US$1.5 billion dollars annually. Adaptation would include farmers’ own adaptation strategies, such as changing planting dates and using drought-tolerant or salinity-resistant varieties, as well as government interventions, including investments in irrigation and increased spending on agricultural research and development. The costs of adaptation, estimated at about US$160 million annually over the period 2010–2050, would be a fraction of the savings from adaptation.

In short, while few systematic studies are as yet available on the cost of climate change adaptation in smallholder agriculture, the available evidence points to overwhelmingly positive benefit-cost balances. This is especially so when taken as the difference between the cost of non-action and the benefits of action, but also when weighing the cost of investments in climate-smart agricultural practices and the gains in terms of yield increases, livelihood improvements and reductions in the number of food insecure. The main issue, therefore, is how to manage the transition to sustainable agriculture and minimize the transaction costs for smallholder systems.

MANAGING THE TRANSITION TO CLIMATE-SMART SMALLHOLDER SYSTEMS

Identifying barriers to adoption and assessing trade-offs

Climate-smart agriculture recognizes that there may be trade-offs, as well as synergies, among its three objectives of sustainably increasing productivity, increasing adaptive capacity and resilience to shocks, and reducing greenhouse gas emissions. This is particularly important when considering options for transforming smallholder agriculture for poverty reduction under climate change. The debate around possible trade-offs between mitigation and food security has been heated, owing to concerns that smallholder producers in developing countries might be forced to bear the costs of reducing greenhouse gas emissions in order to mitigate a climate change problem not of their making and from which they stand to suffer most (Lipper et al., 2015).

The climate-smart approach addresses this issue explicitly by identifying the costs of mitigation actions through development of a site-specific evidence base. First, a proper assessment of the barriers smallholders face in transitioning to climate-smart, sustainable agricultural systems is undertaken (Box 14). The initial assessment is then the subject of dialogue among all stakeholders to decide what changes in policies and incentive structures are needed in order to create enabling conditions for the transition.

Explicit recognition of the costs of making changes is needed in order to adequately identify where trade-offs are possible. For example, the improvement of soil carbon stocks through improved land management and restoration carries investment costs in the form of fencing, seed and machinery, opportunity costs in the form of lost production, and operating costs in the form of annual labour inputs needed to maintain and enhance soil carbon. The costs of adopting practices that increase soil carbon can be quite significant for smallholders, particularly in the initial and transition phases. They can also outweigh the benefits to the farmers themselves, while generating benefits to others, by improving landscape and watershed functions.

Table 10 provides an example of these costs, indicating the number of years before a positive return could be obtained by yak herders in Qinghai Province, China, if they invested in restoring their highly degraded grazing lands. The smallest producers have the smallest returns in terms of the net present value (NPV)^6^ per hectare of investment. They also face the longest wait for positive returns – it would take 10 years for their investment in restoration of degraded grazing lands to yield the same level of income they make with the current degraded system. While the restoration of highly degraded lands is considerably more expensive, the costs associated with the adoption of improved land management practices on good soils also represents a significant trade-off for farmers (FAO, 2009).

The costs that agricultural producers face – and therefore also the trade-offs – are influenced by the policy and institutional environment. An important step in the transition to climate-smart agriculture, therefore, is assessing the need to modify existing policy measures, such as input subsidies, and the potential of social protection programmes to address risks imposed by climate change. For example, subsidies on mineral fertilizer generally do not provide incentives to use fertilizer efficiently; in fact, they may produce quite the opposite effect. Likewise, integrating exposure to climate risks as part of the targeting methodology for social protection programmes is a relatively easily implemented institutional shift in the direction of climate-smart agriculture. Re-orienting agricultural research to integrate climate change adaptation and mitigation is another important component of an enabling environment (Box 15).

The financing challenge

The sustainability of smallholder food production systems will depend upon the ability of smallholders to adopt climate-smart practices and technologies. To accomplish this goal, additional financial investments are needed. However, accessing finance for the agriculture sectors – let alone for climate-smart agriculture – is a challenge in many developing countries and has been for decades. Traditionally, agriculture’s share in the portfolios of financial institutions has been small, and especially so when compared to agriculture’s contribution to GDP. Because the agriculture sector is considered low-profit and high-risk, sources of finance in most countries limit their exposure, tighten lending criteria and impose onerous lending conditions. They often shy away from agriculture altogether, preferring to seek more stable returns from other sectors of the economy. The resulting shortfall in finance severely impacts agriculture, especially farmers and small and medium-sized agribusinesses.

Smallholder farmers face the highest barriers to accessing finance. They usually have limited financial literacy, little or no collateral and credit history, and few other sources of income. Being highly disaggregated and located in areas far from urban centres, smallholders are difficult for lenders to even reach. Their isolation results in transaction costs that are sometimes greater than the size of the loan that farmers require. Access to finance is particularly difficult for women, owing to socio-economic, political and legal barriers.

Moreover, even where formal financial services are accessible, they frequently do not meet the needs; nor do they consider the circumstances of smallholders. Financial institutions tend to offer short-term working capital rather than the investment capital needed for investment in value addition and higher productivity. Moreover, financiers often set rigid repayment schedules and short maturities which, owing to the seasonality of agricultural cycles, do not match the seasonal cash flows of smallholder farmers.

As a result, the vast majority of farmers in developing countries are effectively disenfranchised from the financial system and denied opportunities for economic growth. By one estimate, the total smallholder financing needs in Latin America, sub-Saharan Africa and South and Southeast Asia are some US$210 billion per year (Rural and Agricultural Finance Learning Lab., 2016). Moreover, this financing gap is likely to substantially widen in the future, owing to the need for longer-term loans to fund climate change adaptation and mitigation activities.

Small and medium-sized enterprises (SMEs) also face challenges in accessing finance, in particular longer-term loans. SMEs are critical for agricultural development, as they play a major role in increasing smallholder income and productivity and improving the efficiency of value chains, which generate rural jobs. When SMEs lack the finance to grow to their full potential, they generate fewer jobs and employ fewer workers. The gap in financing for agricultural SMEs thus exacerbates unemployment and poverty in rural areas across the globe. Many SMEs require funds that are too large to be met by microfinance institutions, but not large enough – and perceived as too risky – to secure commercial loans. This is especially problematic when producers and enterprises wish to invest in value-adding infrastructure that could significantly raise their productivity and incomes.

CONCLUSIONS

This chapter has explored the vulnerability of smallholder farming systems to climate change risks, and examined entry points to addressing those vulnerabilities. Several key elements emerge from the analyses undertaken by FAO and from the literature. First, although climate change is a “catch-all” term, its manifestations will be complex and diverse. The binding constraints in terms of productivity vary considerably between farming systems and regions. Furthermore, there is no knowing whether average values, variability or extremes in rainfall or temperature will have the greatest impact on yields. As the world’s climate changes, some of these impacts will be direct and others indirect through, for example, the propagation of pests and diseases. Understanding the key weather constraints and how they are affected by climate change is an important first step in determining the type of support that smallholder farmers will need. Much remains to be done in terms of improving our understanding and communicating it appropriately to stakeholders.

The second important point that emerges from this chapter is that sustainable intensification, improved agricultural technologies and diversification can abate the impacts of climate change, and even reduce considerably the number of people at risk of hunger. However, the widespread adoption of improved technologies may face policy and institutional constraints, which will need to be overcome. Diversification is typically adopted, and found to be more effective, in areas where weather variability is greater, as reported in case studies for Malawi and Zambia. This underscores the importance of addressing specific constraints, as opposed to imposing blanket policies across agro-ecological regions and farming systems.

The third point is that adaptation makes economic sense: the benefits outweigh costs by typically large margins. But that fact alone will not make adaptation happen. It is particularly difficult for smallholders to overcome barriers to adoption of new technologies and practices because of the challenges they face in accessing finance. The same applies to small and medium-sized enterprises that generate income for smallholders and rural jobs that allow for off-farm income diversification.

KEY MESSAGES

1THE AGRICULTURE SECTORS FACE A UNIQUE CHALLENGE: to produce more food while reducing greenhouse gas emissions caused by food production.

2AGRICULTURE COULD REDUCE ITS EMISSION INTENSITY, but not enough to counterbalance projected increases in its total emissions.

3ADDRESSING EMISSIONS FROM LAND USE CHANGE DRIVEN BY AGRICULTURAL EXPANSION IS ESSENTIAL, but sustainable agricultural development will determine its success.

4ALTHOUGH IMPROVEMENTS IN CARBON AND NITROGEN MANAGEMENT ALSO REDUCE EMISSIONS, they are likely to be driven by adaptation and food security objectives, rather than mitigation goals.

5REDUCING EMISSIONS FROM AGRICULTURE also hinges on action to minimize food losses and waste and to promote sustainable diets.

Having examined in Chapter 3 measures that build the resilience of smallholders and vulnerable rural populations to climate change, we take a broader view of agriculture and food systems in order to assess their potential contribution to climate change mitigation. The agriculture sectors will be called upon to play their part in mitigation, because they will generate an increasingly large share of what will become, hopefully, declining levels of global emissions, and because they can, under certain conditions, sequester carbon dioxide.

Agricultural emissions are expected to grow along with food demand, which is being driven by population and income growth and associated changes in diets towards more animal-source products. Agriculture can contribute to mitigation by decoupling its production increases from its emissions increases through reductions in emission intensity, which is the quantity of GHGs generated per unit of output. This, in turn, can be complemented by actions that reduce food losses and waste and foster changes in food consumption patterns.

The agriculture sectors, particularly forestry, have a unique potential to act as carbon sinks by absorbing CO2 and sequestering carbon in biomass and soil. At present, however, deforestation is a major source of emissions, and unsustainable farming practices continue to deplete the Earth’s stock of soil organic carbon. Tapping into the carbon sequestration potential of forests and agricultural lands will depend on biophysical conditions, technical options and policies.

Since agricultural emissions, as well as sinks, are part of the global carbon © and nitrogen (N) cycles, optimizing agriculture’s mitigation potential requires first an understanding of these cycles and how agricultural activities interact with them. This understanding will permit a fuller appreciation of the difficulties inherent in reducing agricultural emissions, which involve complex biophysical processes and are more difficult to monitor and control than emissions from most other anthropogenic sources of greenhouse gases. Improving the efficiency with which natural resources are used in agriculture will be a central element of mitigation strategies.

It is important to recall that in the agriculture sectors it is impossible to separate the objectives of food security, adaptation and mitigation, because there are synergies and trade-offs among them. Growing experience has shown that integrated packages of technologies and practices, tailored to the specific agroecological conditions of producers, are required to deliver mitigation and adaptation in a cost-effective manner.

THE TECHNICAL POTENTIAL FOR MITIGATION WITH ADAPTATION

Agriculture, forestry and land use (AFOLU) are responsible for about 21 percent of total greenhouse gas emissions. All carbon dioxide emissions from AFOLU are attributable to forestry and land use change, such as conversion of forests to pasture or crop production. The bulk of emissions of methane and nitrous oxide are attributable to agricultural practices (Table 5). Improved management of carbon and nitrogen in agriculture, therefore, will be crucial to its contribution to climate change mitigation (Box 16).

Soil carbon sequestration to offset emissions

There is great concern about the magnitude of past and present losses of carbon as a result of human activity. Estimates of losses over the past 150 to 300 years from land use and land-use change, mainly the conversion of forests to agricultural land, range between 100 and 200 billion tonnes (Houghton, 2012). The importance of soils as a terrestrial regulator of the C and N cycles is increasingly recognized, especially following the new climate regime established by the Paris Agreement of December 2015, which calls for action to conserve and enhance sinks and reservoirs of greenhouse gases.

Soils represent the Earth’s second largest carbon pool, after oceans, and small changes in the stock of soil organic carbon may result in large changes in levels of atmospheric CO2 (Chappell, Baldock and Sanderman, 2016). Up to one metre in depth, the world’s soils – excluding permafrost – contain a total of about 500±230 Gt of carbon (GtC), equivalent to twice the amount of carbon as CO2 in the atmosphere (Scharlemann et al., 2014). Soils carry a large potential for carbon sequestration, and this is especially so for degraded soils through restoration measures (Lal, 2010).

The capacity of soil to sequester carbon can be maintained and improved through farming practices that also restore soil health and fertility for agricultural production. Promoting sustainable soil management provides, therefore, multiple benefits: increasing productivity, fostering climate change adaptation, sequestering carbon and reducing emissions of GHG (FAO and ITPS, 2015). While the role of soils as potential sinks and reservoirs is recognized, knowledge of current soil carbon stocks and the soil’s real sequestration potential is still limited, owing to a lack of adequate information and monitoring systems.

In order to tap the potential for soil carbon sequestration, sustainable soil management needs to be promoted as a system, with a range of functions that provide multiple ecosystem services (FAO and ITPS, 2015). The technical potential for SOC sequestration appears to be in a range of 0.37 to 1.15 GtC per year (Sommer and Bossio, 2014; Smith et al., 2008; Paustian et al., 2004). Those are technical potentials and it is implicitly assumed that all agricultural land would be managed to sequester carbon. However, soil C sequestration rates on land in agricultural use vary in the order of 0.1 to 1 tC per hectare per year (Paustian et al., 2016). Therefore, billions of hectares would have to be managed to sequester carbon optimally in order to reach an annual sequestration rate of 1 GtC. Furthermore, levels of sequestration would be relatively low at first, would peak after 20 years, and would then slowly decline (Sommer and Bossio, 2014).

Reducing emissions in livestock supply chains

There is also great potential to reduce the livestock sector’s GHG emission intensity. The precise potential is difficult to estimate as emission intensities vary greatly even within similar production systems, owing to differences in agro-ecological conditions, farming practices and supply chain management. Gerber et al. (2013a) estimate that emissions generated by livestock production could be reduced by between 18 and 30 percent if, in each system, the practices used by the 25 percent of producers with the lowest GHG emission intensity were widely adopted.

Based on six regional case studies and using a lifecycle assessment model, Mottet et al. (2016) estimate that sustainable practices would lead to reductions of between 14 and 41 percent in livestock GHG emissions. In five of the case studies, mitigation resulted in increased production as well as reduced emissions, a double-win for food security and climate change mitigation. Comparably high mitigation potential has been found for ruminant and pig production systems in Africa, Asia and Latin America. Significant emission reductions in countries of the Organisation for Economic Co-operation and Development (OECD) can also be attained in dairy systems with already high levels of productivity (Gerber et al., 2013b).

The practices with highest technical potential for reducing enteric methane emissions and for sequestering soil carbon in grazing lands could reduce GHG emissions by an amount equal to 11 percent of annual global ruminant emissions. In a modelling study by Henderson et al. (2015), improved grazing management and the sowing of legumes were the most affordable practices – and, therefore, had the greatest economic potential. Grazing management was particularly effective in Latin America and sub-Saharan Africa, while sowing legumes appeared to work best in Western Europe. Urea treatment of straw tended to be an economically less attractive option at low carbon price levels, but very cost-effective at a high carbon price of US$100 per tonne of carbon dioxide equivalent (tCO2-eq).

Mitigating nitrous oxide emissions

Together with water, nitrogen is the most important determinant of crop yields (Mueller et al., 2012). Nearly 50 percent of world food production depends on nitrogen fertilizer, while the other 50 percent depends on nitrogen found in soil, animal manure, the tissues of nitrogen-fixing plants, crop residues, wastes and compost (Erisman et al., 2008). Nitrogen is easily lost from agriculture to the environment, through volatilization and leaching, causing environmental damage which has been estimated at about equal to the monetary benefits of using nitrogen fertilizer in food production (Sutton et al., 2011). Emissions of nitrous oxide from applied fertilizer have direct negative impacts: N2O is the third most important greenhouse gas and the most significant cause of ozone depletion in the stratosphere. At the same time, thanks to its key role in photosynthesis and biomass production, nitrogen influences positively the biospheric carbon dioxide sink and carbon sequestration.

Sustainable nitrogen management in agriculture aims at simultaneously achieving agronomic objectives, such as high crop and animal productivity, and the environmental objectives of minimizing N losses. Because the nitrogen cycle is very “leaky”, its management is not easy. Under conditions of climate change and adaptation, it is even more complex because of its close interactions with the carbon and water cycles – utilization and losses of nitrogen in agriculture are strongly influenced by water and carbon availability.

The potential for reductions in nitrous oxide emissions in the global food system by 2030 and by 2050, through the use of improved practices, is illustrated by Table 11. Estimates are based on the potential for increasing N-use efficiency and/or lowering emission intensity (Oenema et al., 2014). Assumptions, based on a literature review and expert views, include improvements in crop and animal production, manure management and food utilization, and lower levels of animal protein in diets. In the results of five scenarios analysed, effects include both direct and indirect N2O emissions. (For comparison purposes, the global warming potential of 1 million tonnes of N2O is equivalent to 265 million tonnes of carbon dioxide.)

In the business-as-usual scenario, annual nitrous oxide emissions from agriculture increase from an estimated 4.1 million tonnes in 2010 to 6.4 million tonnes in 2030, and 7.5 million tonnes in 2050. Reduction strategies could potentially hold emissions at 4.1 million tonnes in 2030 and cut them to 3.3 million tonnes by 2050. Improvements in crop production, notably fertilizer use, appear to have the greatest potential. However, offsetting the projected increases in emissions under the business-as-usual scenario for the year 2030 would require the adoption of all five of the emission reduction strategies presented in Table 11, including behavioural changes such as reducing animal protein in diets, making the reduction estimates uncertain. The strategies appear to be technically feasible, but there are many hurdles on the road to implementation. Large investments in education, training, demonstration and the development of site-specific technologies will be needed to achieve the projected N2O emission reductions.

Achieving reductions in nitrous oxide emissions will depend on management practices that address their underlying root causes. The biophysical processes linked to emissions vary according to climatic and agroecological conditions and farming systems. Nuclear and isotopic techniques can help to understand these processes better, and to improve the monitoring of nitrous oxide emissions (Box 17).

MITIGATION AND ADAPTATION CO-BENEFITS THAT ENHANCE FOOD SECURITY

Better management of the carbon and nitrogen cycles is central to both the mitigation of net GHG emissions from the agriculture, forestry and land use sector and to increasing the efficiency of the global food system. Since mitigation and adaptation measures both contribute to food security and environmental sustainability, they can be implemented jointly and at the same time when there is potential for establishing strong synergies between them. Improving efficiency in the carbon and nitrogen cycles can strengthen resilience to climatic variability, reduce GHG emissions and contribute to food security through higher food output. The key to reaching these objectives is sustainable intensification (see Chapter 3), which seeks to increase food production per unit of input in ways that reduce both pressure on the environment and GHG emissions, without compromising the ability of future generations to meet their own needs (Garnett et al., 2013; Smith et al., 2013).

Many countries see the agriculture sectors as providing the most opportunity for creating synergies between climate change adaptation and mitigation, as well as significant socio-economic and environmental co-benefits. For example, increasing carbon and nitrogen efficiency in food systems reduces GHG emissions and increases carbon sequestration while, at the same time, improving food security and increasing resilience to climate change and climate shocks. More efficient production systems make fewer demands on natural resources and are, therefore, less vulnerable to scarcity and climate events that would further reduce the availability of land, water and nutrients.

By helping to reduce yield gaps and increase biological efficiencies, especially in developing countries, the sustainable intensification of agriculture would prevent deforestation and the further expansion of agriculture into carbon-rich ecosystems, thus simultaneously enhancing food security and contributing to climate change mitigation. In the livestock sector, improving pasture productivity can limit the expansion of pasture into tropical forests and enhance the conservation and sustainable development of carbon rich landscapes (De Oliveira-Silva et al., 2016).

The following section outlines two complementary goals that should be considered in policies aimed at capturing adaptation and mitigation co-benefits: improving production efficiency and minimizing GHG emissions in food systems, and conserving and developing carbon-rich landscapes in agriculture and forestry.

Higher production efficiency, lower emission intensity

Investing in yield improvements

Since the 1960s, the intensification of crop and livestock systems has limited the expansion of farmland and improved the efficiency of food supply chains (Tilman et al., 2011; Gerber et al., 2013a; Herrero et al., 2013). Through higher yields, agricultural intensification avoided GHG emissions between 1961 and 2005 that are estimated to total up to 161 GtC. Investments in productivity compare favourably, therefore, with other commonly proposed mitigation strategies because they limit agricultural land expansion and the large carbon losses associated with deforestation (Burney, Davis and Lobell, 2010).

As agricultural and forestry efficiency have improved over the past few decades, the GHG emission intensity of many products has declined. Between 1960 and 2000, global average intensities fell by an estimated 38 percent for milk, 50 percent for rice, 45 percent for pork, 76 percent for chicken meat and 57 percent for eggs (Smith et al., 2014). Much of the reduction in ruminant emission intensity has been due to reduced output of methane for a given amount of milk and meat (Opio et al., 2013; and Box 18). In both ruminants and monogastrics, improvements in feed conversion efficiency and husbandry, and the selection of highly efficient animal breeds, have played key roles. Reducing the number of animals required to produce a fixed level of output can yield significant efficiency gains. For example, a 28 percent overall reduction in annual methane emissions in the United Kingdom between 1990 and 1999 can be attributed largely to reductions in cattle numbers and the increased productivity of dairy cows (DEFRA, 2001). Strong disparities in resource-use efficiency and GHG emission intensity still exist between animal farming systems and across regions (Herrero et al., 2013), suggesting significant potential for gains.

As well as reducing yield gaps and increasing herd productivity, improved long-term, farm-scale efficiency strategies would conserve and restore soils, water, biodiversity and critical ecosystem services such as pollination (Garibaldi, et al. 2016). For example, in both temperate and tropical regions, farming system diversification and crop-livestock-tree integration would increase farm-scale efficiency and reduce GHG emission intensity (Soussana, Dumont and Lecomte, 2015). A number of technologies can help raise production efficiency and generate co-benefits. They include the use of adapted varieties that harness genetic resources and advanced breeding, adjustments to planting dates and cropping periods, precision farming, judicious use of inorganic fertilizer in combination with organic nutrient sources and legumes, and the design of more diversified, sustainable cropping systems that also consider agro-forestry approaches.

Reducing resource-use intensity in aquaculture and fisheries

The fisheries and aquaculture sector can contribute to climate change mitigation by increasing its sequestration of carbon and reducing emissions from its value chain. It is of primary importance to halt habitat destruction and inappropriate management practices in fisheries and aquaculture, which disrupt the carbon sequestration functions of aquatic systems. There may be great scope for enhancing sequestration through the rehabilitation of mangroves and floodplain forests, even if this comes at an advanced cost for restoration.

In terms of GHG reduction, there is considerable potential for lowering emissions by reducing fuel and energy use. This can be achieved either directly – e.g. through more efficient fishing methods or energy use in processing – or indirectly, through a variety of actions, including energy savings along the supply and value chain and strategic waste reduction. Across the sector, the transition to more energy-efficient technologies is slow, although incentive mechanisms associated with carbon markets have shown some potential (FAO, 2013a).

Energy use in processing, storage and transport is the main source of GHG emissions in fisheries and aquaculture. Processing ranges from simple drying and smoking of fish in artisanal systems to highly controlled seafood preparation using high-specification packaging and labelling. There are wide variations in emissions, depending on local practices, inputs (species, sourcing, quantity and quality) and operating efficiency. As the most widely traded global food products, aquatic foods may travel considerable distances in a range of forms and in various states of perishability. Greenhouse gas outputs are usually directly related to fuel use in transport and to energy use in handling and storage. The most perishable fresh products require fast transport and energy-intensive storage. The choice of refrigerants is also important – the leakage of refrigerant gases from old or poorly maintained equipment depletes the ozone layer in the atmosphere and has significant global warming potential. More stable dried, smoked and salted products processed in artisanal supply chains require methods of transport that are not time-sensitive and produce lower levels of GHGs (FAO, 2013b).

The “Blue Growth” initiative launched by FAO seeks to reconcile economic objectives with the need to manage aquatic resources more sustainably. Fisheries and aquaculture value chains that adopt blue growth have been shown to reap considerable gains in productivity and income, while managing aquatic resources in a way that helps to restore their long-term productive potential. Healthier oceans and wetlands are also more resilient to climate-related shocks, which improves the adaptive capacity of those who earn their livelihood from fisheries and aquaculture.

For example, an FAO project worked with fishing communities in Grand Cess, Liberia, to process and smoke fish products more efficiently. It involved more than 240 fish processors in the construction of fish-smoking ovens and insulated containers for fresh fish storage, which allowed them to smoke fish and sell it on lucrative markets in nearby Côte d’Ivoire. The predominantly female fish processors benefited from substantial increases in their income, while also significantly reducing the amount of wood needed to smoke fish. This further increased their profits while generating important climate change mitigation co-benefits (FAO, 2011a).

Reducing on-farm losses

In developing countries, food losses occur throughout the production chain and hit small farmers the hardest. FAO estimates that between 30 and 40 percent of total food production may be lost before it reaches the market, owing to problems ranging from improper use of inputs to lack of adequate post-harvest storage, processing and transportation facilities. Reducing on-farm losses increases the efficiency of production systems. This can be achieved by improving soil health, reducing the sensitivity of crops and animals to pests and diseases, increasing feed use efficiency in livestock, restoring pollinators and reducing weed competition. Restoration of ecosystem services provided by diversified landscapes can also help to maintain crop and livestock health, and minimize production losses, while investments in roads, logistics, storage and primary processing infrastructure can reduce post-harvest losses.

On-farm diversification and integrated farming systems

As well as reducing yield gaps and increasing herd productivity, improved long-term farm-scale efficiency strategies should conserve soils, water, biodiversity and critical ecosystem services such as pollination (Garibaldi, et al., 2016). For example, in both temperate and tropical regions, farming system diversification and crop-livestock-tree integration would increase resource-use efficiency and reduce GHG emission intensity (Soussana, Dumont and Lecomte, 2015). A number of technologies can help to raise production efficiency and harness co-benefits, including precision-farming, advanced breeding, judicious use of organic and inorganic fertilizers, and better use of legumes, genetic resources and landscape biodiversity.

Carbon-rich landscapes in agriculture and forestry

Since agriculture and forests occupy most of Earth’s land surface, they are vital to the conservation and restoration of soil carbon and the enhancement of carbon sinks. Agroforestry, forest regeneration, plantations, conservation agriculture, organic farming and grazing management can all contribute to those goals, although options will not apply equally across all farming systems and regions.

Forest landscapes

Each year, forests absorb an estimated 2.6 billion tonnes of carbon dioxide (CIFOR, 2010), equivalent to about one-third of the carbon dioxide released from the burning of fossil fuels. However, this immense storage system, once disrupted by deforestation, becomes a major source of emissions. According to the IPCC’s Fifth Assessment Report, deforestation and forest degradation account for nearly 11 percent of all GHG emissions: more than the world’s entire transport sector. As forests are lost, their capacity to sequester carbon is reduced.

During the 1990s, deforestation in the tropics was largely responsible for carbon dioxide emissions, while forest regrowth in the temperate zone and parts of the boreal zone accounted for carbon dioxide removals. However, the extent to which the carbon loss due to tropical deforestation is offset by expanding forest areas and accumulating woody biomass in the boreal and temperate zones is disputed. FAO estimates that during the first decade of this century, total emissions as a result of deforestation were 3.8 Gt of carbon dioxide equivalent (CO2-eq) a year, while the net impact of forest degradation and forest management resulted in the sequestration of 1.8 GtCO2-eq (FAO, 2016a). Also relevant are biomass fires, including peatland fires and drained peatlands, which account for emissions of 0.3 and 0.9 GtCO2-eq a year respectively).

The carbon mitigation potential of reduced deforestation, improved forest management, afforestation and agroforestry differ greatly by activity, region, system boundaries and the time horizon over which mitigation options are compared. Reductions in deforestation dominate the forestry mitigation potential in Latin America and Africa, while forest management, followed by afforestation, dominate in OECD countries, economies in transition, and Asia. Afforestation’s potential contribution to mitigation ranges between 20 and 35 percent of total forestry-related potential (Smith 2014: figure 11.18).

Climate change mitigation actions in the forest sector fall into two broad categories: reducing the emission of GHGs and increasing removals of GHGs from the atmosphere. The options can be grouped into four general categories:

Reducing or avoiding deforestation. Maintaining the area under forest provides considerable socio-economic and environmental benefits (FAO, 2012). It retains biodiversity and ecosystem functions and, in large land areas, influences local weather patterns, which can have impacts on food production (Siikamäki and Newbold, 2012). Reduction of forest fires improves local air quality which has health benefits for communities living in and around forests Mery et al.

Increasing the area under forest. The forest area can be increased through planting, seeding and assisted natural regeneration, and through natural succession. Afforestation leads to increases in the carbon pools held in above-ground and below-ground biomass and in dead organic matter. It is generally undertaken in rural areas and benefits the rural economy by generating income and employment. There is some concern that afforestation and reforestation may diminish food security, if they are carried out primarily on productive agricultural land, and that monoculture plantations reduce biodiversity and are at greater risk of diseases (FAO, 2011b). Careful planning, across all agriculture sectors, is needed when implementing this option.

Maintaining or increasing carbon density. Activities which maintain or increase carbon stocks in forest stands include reduced-impact logging and sustained-yield management in timber production; maintaining partial forest cover; and minimizing the loss of the dead organic matter and soil carbon pools by reducing high-emission activities such as slash-and-burn cultivation (CIFOR, 2015; Putz and Romero, 2015). Replanting after harvesting or natural disturbances accelerates growth and thus the rate of carbon sequestration relative to natural regeneration.

Increasing off-site carbon stocks in harvested wood products. When wood is transformed into long-lived products, such as buildings and furniture, it can act as a reservoir of carbon for decades or even centuries.

The benefits of mitigation through forestry can be amplified through education, training and the participation of rural communities in forestry planning and decision-making. Participatory approaches to forest management can be more successful than traditional, hierarchical programmes and may help to strengthen civil society and democratization processes (FAO, 2016b). They also create social capital, networks and social relations which allow communities to cope better with climate change.

The challenge posed by most forest-related mitigation activities is the need for substantial investment before benefits and co-benefits accrue, typically over many years if not decades. The substantial mitigation potential of forestry will not materialize without appropriate financing and enabling frameworks that create effective incentives.

Another issue is energy production and product substitution, which have social, economic and cultural implications (EEA, 2016). For example, policies in the European Union to increase the use of biofuels, including wood fuels, for energy generation are affecting how foresters in the region manage their forests, and how land in developing regions is used (EC, 2013). There are several reported cases of land grabs for biomass production, which has implications for food security.

Agricultural landscapes

Many current agricultural practices contribute to losses of soil organic carbon and to the reduction of SOC returns to soils (Table 12). Losses can be lowered or SOC returns to the soil increased by reducing fires, overgrazing and soil erosion, or by recycling crop residues and manure. Another option is to change the balance between photosynthesis and ecosystem respiration by increasing crop photosynthesis, through the use of cover crops, intercropping and agroforestry, and by minimizing soil disturbance through conservation agriculture. Large gains in crop carbon balances can also be achieved with improved crop varieties, nitrogen-fixing legumes and organic and inorganic fertilizers, which boost the amount of crop residues available for returning to the soil. Improved water management is also a strong driver of primary productivity, and complements all of those practices.

Practices optimized to sequester soil organic carbon also strengthen food security and facilitate climate change adaptation. As levels of SOC increase, important yield co-benefits could also be achieved year after year in developing countries (Lal, 2006).7 By facilitating improvements in soil structure, water infiltration and water holding capacity, soil organic carbon also helps build resilience to drought and flooding, two climate change impacts that affect particularly tropical regions (Pan, Smith and Pan, 2009; Herrick, Sala and Jason, 2013). However, the impacts on yields are dependent on local conditions and the combination of practices adopted by farmers, and yield losses have been observed (Pittelkow et al., 2015).

Carbon sequestration in agricultural soils may not be lasting. The extra soil carbon stored through improved agricultural practices is partly in unprotected forms, such that a fraction would decompose if the practices ceased. In addition, soil carbon sequestration may increase nitrous oxide emissions in the short term, and deficiencies in soil phosphorus and nitrogen may impede SOC storage (Penuelas et al., 2013).

Action aimed at reaping the climate mitigation benefits of soil organic carbon needs to take a long-term view and be applied at landscape rather than at field scale. It requires an understanding that adoption of soil carbon sequestration measures will take time, and that SOC will increase only over a finite period, up to the point when a new equilibrium is reached. The additional stock will need to be monitored and conserved using appropriate land management practices. All of these factors were considered in an FAO-supported initiative on the restoration of degraded grasslands in the Qinghai region of China (Box 19).

Finally, agroforestry – the integration of trees and shrubs into crop and livestock systems – prevents soil erosion, facilitates water infiltration and reduces the impacts of extreme weather events. It also helps to diversify income sources and provides fodder for livestock. The use of nitrogen-fixing leguminous trees, such as Faidherbia albida, improves soil fertility and yields. Although there is clear and abundant evidence of the positive impacts of agroforestry practices on productivity, adaptive capacity and carbon storage, a wide variety of systems and tree species need to be considered in different contexts.

MITIGATION COSTS, INCENTIVES AND BARRIERS

There are many feasible and promising approaches to climate change mitigation in the AFOLU sector, and the technical potential is considerable. But what are the costs and thus the economic potential of mitigation? In other words, what is the hypothetical price of carbon that would induce farmers, fisherfolk and foresters to apply appropriate practices for sequestering carbon and reducing emissions?

Based on the combined mitigation potential of forestry and agriculture, estimated in the IPCC’s Fourth Assessment Report, the IPCC suggests an economic potential in 2030 of between ≈3 and ≈7.2 Gt of carbon dioxide equivalent a year at carbon prices of US$20 and US$100 per tonne, respectively (Smith et al., 2014).8 Among regions, the largest mitigation potential for agriculture, forestry and land use is found in Asia, at all levels of carbon values (Figure 15, based on Smith et al., 2014).

Forestry could make a significant contribution to mitigation at all levels of carbon prices. At low prices, the contribution of forestry is close to 50 percent of the total from the AFOLU sector; at higher prices the share of forestry is lower.

Forestry represents the bulk of mitigation potential in Latin America, at all levels of carbon prices. However, different forestry options have different economic mitigation potentials in different regions. Reduced deforestation dominates the forestry mitigation potential in Latin America and in the Middle East and Africa. Forest management, followed by afforestation, are the major options in OECD countries, Eastern Europe and Asia.

Among other mitigation options, cropland management has the highest potential at lower carbon prices of US$20 per tonne. At US$100, the restoration of organic soils has the greatest potential. Also, the potential of grazing land management and the restoration of degraded lands increases at higher carbon prices (Smith et al., 2014).

These estimates of economic mitigation potential provide broad indications of how to target interventions in the most cost-effective way. However, more detailed assessments are needed in order to properly assess AFOLU’s mitigation potential, the impacts on vulnerable production systems and groups, and the costs of implementation. It is a pre-requisite that practices optimized to reduce GHG emissions or sequester carbon should also protect the land tenure rights of small-scale producers and contribute to food security and climate change adaptation, particularly for the most vulnerable groups.

A range of institutional and economic approaches can facilitate the implementation of agricultural emission reductions. On the institutional side, these would include providing information to farmers about agricultural practices that create adaptation/mitigation synergies and, if needed, access to credit to implement them. On the economic side, options include positive incentives for farmers to provide and maintain carbon sinks; taxation of nitrogen fertilizer in countries where it is being overutilized, a measure which is already applied in some OECD countries to reduce nitrate pollution; and supply-chain initiatives that market food products with a low carbon footprint (Paustian et al., 2016).

A FOOD SYSTEM PERSPECTIVE: MINIMIZING LOSSES AND WASTE, PROMOTING SUSTAINABLE DIETS

Reducing food losses and waste, and promoting a transition to more sustainable diets, can also deliver emissions reductions and contribute to global food security (Bajželj et al., 2014). FAO has estimated that every year roughly one-third of the edible parts of food produced for human consumption is lost (FAO, 2011c), representing an enormous waste of the land, water, energy and inputs used to produce it and unnecessary emissions of millions of tonnes of greenhouse gases. Reducing food losses and waste by increasing the overall efficiency of food chains could contribute to reducing GHG emissions, as well as enhancing access to food and improving the resilience of food systems to climate change.

In low-income countries, food losses occur throughout food value chains, and result from managerial and technical limitations in harvesting, storage, transportation, processing, packaging and marketing (HLPE, 2014). The heaviest losses are in the small and medium-scale agricultural and fisheries production and processing sectors. Social and cultural conditions – such as the different roles that men and women play at different stages in the value chain – are frequently the underlying causes of food losses. The difficulties that women face in obtaining access to, and benefits from, resources, services, jobs and income-generating activities affect their productivity and efficiency in food production, which exacerbates food losses.

Food waste in middle and high-income countries is caused mainly by consumer behaviour and by policies and regulations that address other sectoral priorities. For example, agricultural subsidies may encourage the production of surplus food crops, which reduces both prices and the attention that is paid – along the value chain and by consumers – to food losses and waste. Furthermore, food safety and quality standards may remove from the supply chain food that is still safe for human consumption. At the consumer level, inadequate planning of purchases and failure to use food before its expiry date also lead to food waste.

Dietary patterns strongly influence some of the factors that are driving climate change. In countries where food consumption is increasing, diets generally include more livestock products, vegetable oils and sugar. This trend is expected to continue as a result of growth in incomes. A number of studies have looked at the environmental consequences of consumption of animal-source food, usually focusing on GHG emissions and land use (INRA and CIRAD, 2009; Erb et al., 2009; Tilman and Clark, 2014; Tukker et al., 2011; Van Dooren et al., 2014). Using life cycle assessments, they generally conclude that alternative diet scenarios with less animal-source food could contribute to reducing global GHG emissions, and have positive impacts on human health.

There is increasing evidence that dietary patterns with low environmental impacts are also healthier. Common features of such diets are the diversity of foods eaten, a balance between energy intake and energy expenditure; the inclusion of minimally processed tubers and whole grains along with legumes, fruit and vegetables, and meat, if eaten, in moderate quantities. Healthy diets also feature dairy products in moderation, unsalted seeds and nuts, small quantities of fish and aquatic products, and very limited intake of processed foods that are high in fat, sugar or salt and low in micronutrients (FAO and FCRN, 2016).

Another critical factor that needs to be considered is the energy used in modern food systems to process food and bring it to consumers (Box 20). In high-income countries, perishable products require significant energy use, and corresponding levels of GHG emissions, in the storage, distribution and consumption stages. Fischbeck, Tom and Hendrickson (2016) have shown that following United States dietary guidelines for healthy weights would increase energy use by 38 percent, water use by 10 percent and GHG emissions by 6 percent. This is due to the bigger share in the diet of fruits and vegetables, which have a high energy, GHG and water footprint in the United States. This illustrates the importance of taking into account the specific characteristics of production systems in determining environmental footprints. It also indicates that there can also be trade-offs between reduced environmental impacts and healthier diets.

Bearing in mind the very large diversity at global level, rebalancing diets to reach nutritional targets could nevertheless bring very large co-benefits, through GHG mitigation and improvements in the overall efficiency of food systems (Tilman and Clark, 2014). Further examination of demographic and social differences, including fast-growing food consumption in developing countries, is needed to inform strategies for promoting optimal diets with improved health outcomes and reduced levels of nitrate pollution and greenhouse gas emissions. Multidimensional life cycle assessments at regional and global levels are needed to estimate the adaptation and mitigation effects of different dietary transitions, including the possible trade-offs.

CONCLUSIONS

Agriculture, forestry and land use are primary drivers of the terrestrial carbon and nitrogen cycles. Better management of these cycles in agriculture, forestry and aquaculture can provide multiple benefits in terms of food security and climate change adaptation and mitigation. Policies need to pursue three complementary goals:

to increase agricultural production efficiency and minimize farm-level GHG emission intensity;

to conserve and restore, through agricultural and forestry management, carbon-rich soils and carbon-rich landscapes; and

To guide food systems towards reduced food losses and waste, and towards healthier diets.

Pursuing these goals simultaneously would help tap into the potential for co-benefits of adaptation and mitigation. Priorities in food and agricultural policies will need to be re-set – from a narrow focus on reducing yield gaps to a much broader focus on other, equally important, objectives: soil conservation and restoration to enhance the capacity of soils to sequester carbon dioxide; improvements in nitrogen management to reduce emissions and enhance productivity; practices that simultaneously increase farm level production efficiency and minimize GHG emission intensity; measures to minimize losses and waste within food systems and to promote sustainable diets; and diversification strategies that increase the resilience of production systems to climate change and climatic variability.

Having focused, in this chapter, on the mitigation side of the adaptation-mitigation nexus in agriculture and food systems, Chapter 5 will examine an agricultural response to climate change, in terms of policies and institutions.

KEY MESSAGES

1THE AGRICULTURE SECTORS FEATURE prominently in nearly all the Intended Nationally Determined Contributions submitted by countries in preparation for the United Nations Climate Change Conference in Paris (COP21).

2IN THEIR INDCS, COUNTRIES HAVE MADE STRONG COMMITMENTS to both adaptation and mitigation efforts in agriculture.

3FOLLOW-UP ACTION PLANS CAN ONLY BE EFFECTIVE IF THEY ARE PART OF BROADER, transformative policies on agriculture, rural development, food security and nutrition.

4THE INTERNATIONAL COMMUNITY MUST SUPPORT DEVELOPING COUNTRIES in strengthening their capacity to design and implement integrated policies that address agriculture and climate change.

Chapters 3 and 4 presented the economic and technical options for building resilience to climate change and contributing to climate change mitigation. Those options will need to be enabled and supported by appropriate policies, institutional frameworks and investment finance mechanisms. Many of these are important for agricultural development in general, but become even more necessary when addressing climate change. Existing policy frameworks need to be modified to integrate climate change concerns. As well as addressing agriculture and food security sensu stricto, they will need to encompass land and water management, disaster risk management, social protection, and research and development.

Many countries have designed broad climate change policies and strategies, which establish overall objectives and targets that reflect the relative importance of various sectors in their economies, as well as their national priorities. However, as yet, few have spelled out detailed action plans to achieve climate targets. This chapter provides an overview of policy actions proposed by countries in relation to agriculture and land use, and land-use change and forestry (LULUCF) in their Intended Nationally Determined Contributions (INDCs) under the United Nations Framework Convention on Climate Change (UNFCCC). It then discusses how these national commitments need to be linked to policies and institutions in order to ensure an effective response to the climate challenges facing agriculture.

AGRICULTURE NOW CENTRAL TO “INTENDED CONTRIBUTIONS

At the Paris Climate Conference (COP21) in December 2015, countries’ Intended Nationally Determined Contributions served as the basis for negotiations and helped to produce the Paris Agreement on climate change. However, while countries committed themselves to defined mitigation targets, those targets – if reached – would result in aggregate greenhouse gas emission levels in 2030 some 28 percent higher than those required to keep the global temperature increase below 2 ˚C.

Even though ambitions fall short of what is needed, and despite an apparent resistance to undertaking binding international commitments, many countries have taken steps to define their climate change actions. Under the Paris Agreement, each party to the UNFCCC is to prepare and maintain a Nationally Determined Contribution (NDC), to be renewed every five years and recorded in a public registry. If a country has previously submitted an INDC, it will become an NDC once the country ratifies the agreement. While not binding, the NDCs are meant to guide country-level climate action in the coming years. They include not only targets, but also concrete strategies for addressing the causes of climate change and responding to its effects.

While all the INDCs prepared for Paris were meant to cover mitigation, parties were also invited to consider including an adaptation component, or communicating their undertakings in adaptation planning. As of 31 March 2016, INDCs had been submitted to the UNFCCC by 188 countries.9 All of them contain mitigation commitments, and about 70 percent of them also include a section on adaptation.

An FAO analysis of the INDCs submitted before COP21 shows that the agriculture sectors do feature prominently (FAO, 2016). More than 90 percent of countries include the agriculture sectors in their mitigation and/or adaptation contributions. In addition, developing countries – particularly the least-developed countries (LDCs) – put a strong emphasis on the agriculture sectors in terms of both mitigation and adaptation:

Mitigation. Agriculture10 and land use, land-use change and forestry are among the most referenced sectors in mitigation contributions, which set out targets and/or actions for mitigation efforts. This holds, in particular, for the INDCs submitted by developing countries. Most countries, however, have not specified agriculture and LULUCF-specific mitigation targets, but have subsumed these under economy-wide targets for GHG emission reduction.

Adaptation. More than 90 percent of developing countries included in their INDCs a section on adaptation to climate change in their agriculture sectors, and consider it an issue of major concern. Adaptation features in all INDCs submitted by countries in sub-Saharan Africa and Eastern and Southeast Asia. Most LDCs also highlight extreme events as their main adaptation challenge, and more than 80 percent of them mention droughts and floods as immediate threats.

Synergies among actions aimed at climate change adaptation and mitigation in the agriculture sectors are highlighted in many INDCs, as much as co-benefits foreseen in terms of improved social and economic outcomes and environmental protection. About one-third of all countries mention such co-benefits. Thirty-one countries explicitly mention climate-smart agriculture Specific reference is made to joint benefits in terms of rural development, improved health, poverty reduction and job creation, on the one hand, and conservation of ecosystems and biodiversity, on the other. Likewise, the importance of reducing gender inequalities and promoting women’s empowerment in order to improve agricultural production, while reducing vulnerability to the impacts of climate change, is underlined in many of the INDCs.

The INDCs were not prepared according to a standard format. Therefore, they are heterogeneous in length, coverage and level of detail. Because of this heterogeneity, caution is needed when comparing country priorities and actions beyond broad patterns. However, the INDCs submitted do provide a clear indication of the importance attached to the agriculture sectors, by the vast majority of countries, in terms of both adaptation and mitigation. At the same time, however, it is clear that much better tools are needed to tailor climate actions to the specific characteristics and circumstances of the agriculture sectors (Box 21).

The INDCs also highlight how adaptation and mitigation actions in the agriculture sectors are particularly rich in potential co-benefits. As countries move from intentions to implementation, many have expressed concern about the adequacy of available financial resources and about their own institutional capacity. Countries of sub-Saharan Africa express such concerns most often, and their INDCs are also among the most detailed and exhaustive when it comes to agriculture.

FROM INTENTIONS TO ACTION: AGRICULTURE IN CLIMATE STRATEGIES

Since the Nationally Determined Contributions are general, non-binding commitments, and not action plans, the commitments undertaken need to be translated into action at the national level. This directly concerns agriculture and food security policy-making. However, it also entails the mainstreaming of climate change considerations into a range of other policies and action areas that are highly relevant to agriculture and food security, such as land and water management, but also disaster risk management and social protection. The challenge is to incorporate the agriculture sectors into national climate change strategies, which are themselves linked to UNFCCC mechanisms (Figure 16).

A series of instruments have been designed under the UNFCCC for linking international climate change commitments to concrete action for mitigation and adaptation at the country level:

National Adaptation Programmes of Action (NAPAs) were originally established by the UNFCCC as a dedicated, harmonized, country-led instrument for least developed countries. The programmes identify priority activities responding to “urgent and immediate needs” – for which further delay could increase vulnerability or lead to increased costs at a later stage – for climate change adaptation. To date, 50 countries have submitted NAPAs to the UNFCCC Secretariat (UNFCCC, 2016a). Agriculture and natural resource management issues are particularly prominent in them. The great majority of priority projects are related to the agriculture sectors and food security (Meybeck et al., 2012), and most belong to one of five main categories: cross-sectoral (including early warning systems, disaster management, education and capacity building), management of ecosystems, water management, plant production and livestock, and diversification and income. All NAPAs are eligible for funding under the LDC Fund, which is managed by the Global Environment Facility (GEF) for their implementation.

National Adaptation Plans (NAPs) focus on addressing medium and long-term adaptation needs and provide a significant opportunity to integrate the concerns and needs of the agriculture sectors and actors in broad national strategies and policies. Three countries – Brazil, Burkina Faso and Cameroon – have each completed a NAP, and all give importance to adaptation in agriculture.

Nationally Appropriate Mitigation Actions (NAMAs), as defined by the UNFCCC, are prepared by national governments in the context of sustainable development and provide for nationally appropriate actions that reduce emissions in developing countries (UNFCCC, 2016b). They typically include more detailed actions than INDCs and can be project-based, programmatic, sector-wide, or focused at the policy level (Wilkes, Tennigkeit and Solymosi, 2013). Sectoral policies need to be defined or revised and aligned with climate policies and priorities. Baseline scenarios have to be constructed and the mitigation potential of different options estimated. The barriers to implementation of these options need to be identified. Institutional arrangements for coordination and financing, as well as for measuring, reporting and verification, must be established. Some 13 percent of the NAMAs in the convention’s NAMA registry are in the AFOLU sector (UNFCCC, 2015).

INTEGRATED APPROACHES THAT ALIGN CLIMATE AND DEVELOPMENT GOALS

The NAPAs, NAPs and NAMAs focus on actions that address climate change, either through adaptation or mitigation. However, as discussed in Chapters 3 and 4, to be effective and to ensure that co-benefits are achieved, these actions need to be an integral part of broader agriculture, food and nutrition policies.

Restoration of forests and degraded soils, climate-smart agricultural practices, agroecology and better management of water resources can all contribute to the productivity improvements needed to respond to the growing demand for food, improve the resilience of farming systems and reduce the emission intensity of crops, livestock, fisheries and forestry, while increasing carbon sequestration in soils and forests. However, as indicated in Chapters 3 and 4, a shift towards sustainable practices in the agriculture sectors may not be enough to place food systems on a sustainable pathway and to eradicate hunger. For that, further efforts are needed to improve the resilience and livelihoods of the food insecure and, across all economic sectors, to ensure a reduction in GHG emissions in order to prevent the global temperature from increasing by more than 2 °C. Agricultural and rural development policies that help diversify income and employment opportunities for the poor and food insecure need to be complemented by policies that address the carbon footprint of entire food systems – for example, through measures that align dietary preferences with environmental objectives.

From the perspective of agriculture, such an integrated approach needs to start from an understanding of the drivers of agricultural production and natural resource management choices, of their impacts on farmers’ livelihoods and of the consequences for the environment. Doing so is complex, and win-win solutions may not always be possible. Policies, market forces and environmental constraints drive the use of inputs and other resources in agriculture, the levels of productivity, and the degree of conservation or depletion of natural resources. These drivers vary significantly among countries. Subsistence farmers in Africa and smallholders in Asia face different constraints and do not have the same ability to respond to policy and market signals as global agri-businesses. As shown throughout this report, climate impacts vary widely by region, and will have to be addressed according to local circumstances. Despite those differences, there are a number of common areas where trade-offs between climate and food security objectives can be addressed and where different policy domains should come together.

Undoing environmentally harmful subsidies and support measures

The OECD countries spent US$211 billion in agricultural production support in 2015. In the non-OECD countries for which data are available, this support reached US$352 billion in the same year.11 Governments support farmers and agri-businesses to provide direct stimulus to agricultural production, influence input costs, supplement farm incomes, and achieve other social, economic and environmental objectives, such as landscape preservation, water conservation, poverty reduction, and climate change mitigation and adaptation. Much of the existing production support in both developed and developing countries involves subsidies on inputs, such as fertilizer and energy, particularly fossil fuels, or direct payments to farmers. In OECD countries, support measures have been declining since the 1980s, both in real and relative terms. Relative to the value of production at the farm gate, support dropped significantly, from 46 percent in 1986 to 20 percent in 2014. In contrast, in most non-OECD countries for which data are available, agricultural production support is increasing.

Support measures may have unintended impacts on the environment, if misaligned with efforts to address climate change and environmental concerns. For example, input subsidies may induce inefficient use of synthetic fertilizers and pesticides and increase the emission intensity of production. Almost half of all agricultural subsidies provided by governments of OECD countries in 2010–12 were “potentially most harmful to the environment” by inducing greater demand for chemical fertilizers and fossil fuels and leading to more greenhouse gas emissions (OECD, 2015). The share of environmentally damaging subsidies has fallen from 75 percent in 1995, while the share of subsidies and payments subject to compliance with environmental regulations has increased. While that is a promising trend, OECD countries still have some way to go to align overall agricultural price policies with incentives to adopt environmentally sustainable production practices.

In developing countries, trends are towards increasing use of producer price support and input subsidies. Input subsidies are often motivated by the belief that, by reducing input costs, yields will increase and food security will improve. As discussed in Chapter 3, in some contexts, particularly in parts of sub-Saharan Africa, incentives to increase the use of nitrogen fertilizer can indeed have the co-benefit of enhancing productivity and improving the resilience of smallholder producers. However, benign impacts do not apply in all contexts, such as in East Asia, where excessive use of fertilizer has no production benefit and instead causes severe environmental harm (Fixen et al., 2015). Hence, careful assessment and policy design are needed to avoid creating incentives that counteract environmental goals.

One way of aligning agricultural development and climate goals would be by making agricultural support measures conditional upon the adoption of agricultural practices that lower emissions and conserve natural resources. As subsidy levels are significant, there is scope for a re-alignment and a re-direction of incentives. However, none of this will suffice without concerted efforts to align policies on climate change and agriculture with policies in other domains, particularly the energy sector (Box 22).

Managing natural resources

Another key domain for policy synergy is sustainable natural resource management. Optimizing the sustainable use of land and water requires appropriate governance and mechanisms to manage synergies and trade-offs between different objectives, interests and time scales. To achieve multiple objectives in agriculture, energy and forestry, large-scale land-use planning is needed in order to identify priority areas for REDD+, agricultural production and forests for other uses, such as biomass energy production.

Crops and livestock are the most important sectors driving deforestation and forest degradation. The energy sector is also closely linked to forests in most developing countries, through the widespread dependence on wood fuels, especially in Africa and Asia, and the expansion onto forest land of biofuel feedstock production, mainly in Asia and Latin America. The success of climate change mitigation and adaptation actions will be heavily dependent, therefore, on the harmonization of objectives across the agriculture and energy sectors. To ensure national ownership and political sustainability, REDD+ will also need to contribute to realizing the objectives of other key economic sectors.

Supporting and facilitating collective action

Climate change gives rise to new and increasing demands for collective action and, consequently, coordination among stakeholders. These demands should be met through policies and institutions that facilitate and support coordinated design and implementation of actions, either in a specific area – e.g. a watershed or forest – or in a sector, such as an entire food chain. Promoting inclusiveness and transparency in decision-making, and providing incentives to actions that aim to induce long-term public and collective adaptation benefits, are particularly important for the management of natural resources (Place and Meybeck, 2013).

In order to support landscape restoration, for example, cross-sectoral coordination is essential. Agencies often work in relative isolation, and even at cross-purposes. This is at least partially due to how institutions are structured and the lack of capacity of institutions to cooperate closely in land-use planning and management. There is a need – and a real scope – for institutions dealing with ecosystem and land-use issues to integrate the management of natural resources, especially forests, trees, soil and water, through improved, multisectoral land use (Braatz, 2012).

To support improved governance of land and water tenure systems under climate change, multistakeholder dialogue, taking into account the interests of women, the poor and marginalized groups, is a promising option. For instance, experience over past decades has shown that forests can be managed well and degradation can be reversed by involving local communities, with support from legitimate decentralized institutional arrangements developed through consultative processes (FAO, 2013). There are many examples of forest farmer groups (FAO and AgriCord, 2012) and community forestry groups (e.g. Nepal’s Community Forest User Groups). The same holds for community fisheries groups and organizations.

Social networks are also important components of local governance and can help to provide for effective responses to climate change. Traditional forms of reciprocal and mutual labour – for example, in soil and water conservation work and in shifting cultivation systems – have been partly or totally abandoned in many areas, owing to socio-economic changes (FAO, 2013). Supporting or reactivating these forms of cooperation for restoration work, where appropriate, may be beneficial. Encouraging informal social networks to share information and experience on adaptation options may also help to build social resilience to climate change. Such networks can play a key role in establishing surveillance, monitoring and early warning systems.

Managing risks

Climate change is bringing new risks and changing existing ones (FAO and OECD, 2012). Better management of actual risks has been highlighted by the IPCC as a key adaptation action. This requires appropriate institutions and policies, which are mostly sector-and/or risk-specific. Weather stations, weather and climate projection tools, yield response models, environmental monitoring tools and vulnerability assessments can help to determine how local climate conditions will change in the future, and to estimate their impact on production. They are essential for reliable early warning systems and for assessing adaptation options.

Comprehensive risk management strategies require a clear understanding of the robustness of different risk management instruments under climate uncertainty (Antón et al., 2013). They also require coordination of actions by public, private and civil society sectors, from the global to local levels (World Bank, 2013). National governments could provide mechanisms for proactive and integrated risk management – such as a national board that coordinates risk management strategies with institutions for risk monitoring, prevention, control and response at the local and global levels – and provide incentives for private sector participation in risk coping. As highlighted in Chapter 3, social protection programmes that guarantee minimum incomes or access to food have an important role, but need to be well linked with other forms of climate and disaster risk management (Box 23).

Policies are also needed to reduce financial risks, lower transaction costs, facilitate financial transactions, enable access to financial services, and facilitate long-term investments, through safe savings deposits, low-priced credit and insurance. The financial needs of smallholders and family farmers for both working capital – for example, to buy fertilizer and seed – and for medium and long-term investments must be addressed and supported.

Last but not least, policies and institutions must actively support the diversification of livelihood strategies. Livelihood diversification is among the most effective risk management strategies for smallholders and family farmers facing climate change. Depending on the specific context, it might include land-use diversification as well as income or labour diversification. Agricultural and rural development policies thus need to integrate diversification as a key component, and local institutions need to facilitate it by providing incentives through improved access to credit, insurance, information and training.

Building institutions and policies for more resilient systems with lower emissions

Given the emphasis countries have placed in their INDCs on both mitigation and adaptation, supporting food producers in their efforts to adapt to climate change, while keeping GHG emissions in check, must become a priority. To adopt new and more resilient livelihoods, farmers, herders, fisherfolk and foresters need an institutional environment which supports that change. At present, however, this type of enabling policy and institutional environment is often lacking, especially for smallholder producers.

Institutional arrangements that support increased and stabilized returns from agricultural production are essential. Agricultural input and output markets play a central role here, but other institutions – such as rural credit and insurance programmes, agricultural extension, land and water tenure arrangements, and input subsidy programmes – have all been found to play important roles in supporting, or hindering, smallholders in the transition to systems with higher resilience (see Chapter 3 as well as: McCarthy, Best and Betts, 2010; Asfaw, Coromaldi and Lipper, 2015; Asfaw et al., 2015; Asfaw, DiBattista and Lipper, 2014; Arslan et al., 2014; 2015; Arslan, Belotti and Lipper, 2015).

In order for food producers to access the inputs and know-how needed for climate change adaptation, and to be able to sell the products of their diversification activities, it will be even more important, under climate change, to create solid links between smallholders and local, national and regional markets. Developing market linkages also requires investment in small- and medium-size food processors, and in small-scale traders at the retail and wholesale levels. Government intervention may be needed to reduce transaction costs in accessing markets and to establish regulatory instruments that bridge the gaps in economic and political power that divide smallholders and their organizations from other contracting organizations.

STRENGTHENING REGIONAL AND INTERNATIONAL COOPERATION

Transboundary issues

Addressing climate change often requires collective management of natural resources, which may, in turn, require transboundary action. Moreover, climate change will increase the potential for movements of pests and diseases, as well as movements of products, from one country to another. This calls for strengthened regional and international cooperation to facilitate exchanges of knowledge, manage common resources, and exchange and value plant and animal genetic resources.

Many resources upon which the agriculture sectors depend – such as water, fish stocks and ecosystems – are transboundary in nature. Changes in the environment will lead to changes in the availability of these resources and to the migration of species, people and human activities as they seek to adjust to these changes. In addition, extreme events, such as forest fires, species invasions, and pests and diseases, reach across national boundaries. Policies and institutions dedicated to the prevention and management of specific risks and vulnerabilities that are being affected by climate change are mainly local and national, but they can be effectively supported by international cooperation and tools.

Multicountry and regional action to monitor and manage changes in natural resources, as well as risks to the agriculture sectors and food security, is thus crucial to addressing climate change. Important examples of transboundary cooperation in the agriculture sectors include:

Regional fisheries bodies, institutions and networks, which work together in the adaptive regional management of transboundary fisheries stocks and the regional control of fish diseases. For example, the management of industrial fisheries for skipjack and yellowfin tuna in the equatorial waters of the western Pacific Ocean keeps catches within sustainable bounds and optimizes the distribution of economic benefits.

Regional forestry commissions, which coordinate actions that have transnational implications and which benefit from collaboration among countries in the regions. Examples of joint action include regional initiatives on forest fires and invasive species, as well as regional collaboration on forest resource assessments.

Institutions for transboundary water resource management, such as the Nile Basin Initiative and the Mekong River Commission, which help develop a shared vision of demands on water resources within regional water basins.

Regional projects, such as the Great Green Wall initiative to combat desertification in Africa.

Regional and global early warning systems, such as FAO’s Global Information and Early Warning System and its Emergency Prevention System for Animal Health.

The FAO Desert Locust Control Committee, which consists of 64 countries, and strengthens national capacities in desert locust monitoring, control, contingency planning, training and environmental safety in nearly 30 countries.

The role of trade in adaptation and mitigation

An efficient international trading system is important for both climate change adaptation and mitigation. Climate change may have far-reaching impacts on global production patterns and patterns of international trade in food and agricultural products. Trade may be part of adaptation strategies for regions adversely affected by climate change. Trade restrictions, such as tariff and non-tariff barriers, which limit the response of global agricultural production to changes in demand and supply under climate change, should be minimized. However, since impacts are expected to be worse in low-latitude regions (see Chapter 2), climate change is likely to exacerbate existing imbalances between the developed and developing world. Climate change underscores the need to help developing countries deal with food and energy price increases, as well as volatility in food supplies.

Existing trade policy frameworks are far from being “climate-compatible”. For instance, the role of trade measures in international negotiations on climate change stabilization is unclear. There is no consensus as to whether current World Trade Organization (WTO) trade rules can promote adherence to climate goals, or are a threat to mutually agreed climate solutions (Early, 2009). In fact, various forms of climate change mitigation policies could be challenged under WTO rules if they were deemed to be trade distorting. This could apply, for example to: payments for environmental services, such as forest and soil carbon sequestration; policies implemented as unilateral measures, such as carbon taxes or cap-and-trade regimes; and related border adjustment measures that place duties on imports from countries not undertaking comparable mitigation efforts based on the carbon-content of products or production methods.

A key step towards reaching an international agreement on the harmonization of trade rules with climate objectives will be to tackle concerns that climate measures may distort trade, or that trade rules could stand in the way of greater progress on climate change (Wu and Salzman, 2014).

CONCLUSIONS

In the Intended Nationally Determined Contributions submitted in preparation for COP21, a large number of developed and developing countries clearly expressed their determination to ensure an effective response by the agriculture sectors to climate change, in terms of both adaptation and mitigation. This determination needs to be translated into concrete action with the support of an enabling policy and an institutional environment, as well as regional and international cooperation. Action plans should now build on a recognition that there are important synergies and trade-offs between mitigation, adaptation, food security and the conservation of natural resources. Creating co-benefits requires coordination across all relevant domains.

Unfortunately, there is a general lack of coordination and alignment of agricultural development plans and actions that address climate change and other environmental problems. This is leading to the inefficient use of resources and is preventing the integrated management required to address climate change threats, ensure productivity improvement in food production and enhance the resilience of vulnerable households. At the same time, it should be recognized that assessments of the impacts of climate change are surrounded by uncertainty and hampered by large knowledge gaps. To better inform policy action, much greater efforts are needed to improve assessment tools and close knowledge gaps, for example by strengthening statistical systems and climate forecasting and monitoring capacity (Box 24).

Breaking down the silos between policies on adaptation, mitigation, food security, nutrition and natural resources is essential also when determining the financing needed to support the transition towards sustainable, climate-smart food systems. The next chapter turns to the issue of linking climate change action and agricultural finance.

KEY MESSAGES

1INTERNATIONAL PUBLIC FINANCE FOR CLIMATE CHANGE ADAPTATION AND MITIGATION is a growing, but still relatively small, part of overall finance for the agriculture sectors.

2MORE CLIMATE FINANCE IS NEEDED to fund developing countries’ planned actions on climate change in agriculture.

3PROVIDED POLICIES AND INSTITUTIONAL FRAMEWORKS THAT PROMOTE TRANSFORMATIVE CHANGE ARE IN PLACE, international public climate finance can act as a catalyst to leverage larger flows of public and private funding for sustainable agriculture.

4CAPACITY CONSTRAINTS CURRENTLY HAMPER DEVELOPING COUNTRIES access to and effective use of climate finance for agriculture.

5INNOVATIVE FINANCIAL MECHANISMS can strengthen the capacity of financial service providers to manage risks related to climate change, helping to leverage investments for climate-smart agriculture.

The previous chapters of this report highlighted the benefits of climate change mitigation and adaptation interventions in the agriculture sectors. Most of the adaptation interventions needed are similar to interventions that promote general rural development, but they should be designed with a focus on changing climatic conditions and related risks, constraints and opportunities. Many of the agricultural practices proposed are relatively low-cost and have both mitigation and adaptation benefits, which increases their cost-effectiveness.

Chapter 3 showed that the costs of adaptation actions in smallholder agriculture would be a fraction of the benefits and, hence, would justify generous allocations of climate finance. The case for funding increases becomes even stronger when considering the mitigation co-benefits of climate-smart development, illustrated in Chapter 4, and the emphasis that countries have placed on adaptation and mitigation in agriculture in their Intended Nationally Determined Contributions (INDCs), as discussed in Chapter 5. This chapter examines the role of finance in climate change adaptation and mitigation in the agriculture sectors, and how public finance – both international and domestic – can be used more effectively to support adaptation and mitigation efforts.

CLIMATE FINANCE FOR AGRICULTURE

Still relatively small, but with catalytic potential

There is no single definition of “climate finance”. It may be loosely defined as all finance that, regardless of origin, contributes to climate change adaptation and/or mitigation objectives. It is useful, however, to distinguish between public and private sector financing since they can play complementary roles in mobilizing resources for climate change adaptation and mitigation.

While difficult to track, available estimates suggest that the private sector is by far the largest source of finance for climate change adaptation and mitigation efforts, contributing approximately 62 percent of the US$391 billion invested in addressing climate change in 2014 (Buchner et al., 2015). Farmers, from small to large, are the biggest investors in agriculture, providing many times what governments provide for rural infrastructure and agricultural research and development. Most agricultural investments are financed from domestic resources – whether public or private – and only a small share of the funding comes from international sources (FAO, 2012). However, while small in magnitude, international public financing can act as a catalyst, leveraging private financing and investments in agriculture, including climate-related investments.

Starting from low levels, international public finance for climate change mitigation and adaptation in agriculture, forestry and fisheries has increased substantially since 2002. By the end of 2014, it had reached nearly US$4 billion Norman & Hedger, 2016. and around 12 percent of overall official development assistance (ODA) was committed for climate-related investments (OECD, 2015a). This is only a fraction of overall domestic government spending on agriculture by developing countries, which totalled approximately US$252 billion in 2012.12 However, when used properly, climate-related finance can help redirect other sources of finance for agricultural development towards investments in enabling institutions, technologies, and practices that contribute to climate change adaptation and mitigation in the sector.

Trends in international public climate finance for agriculture13

International public climate finance has evolved in line with the incremental nature of commitments made in the UNFCCC process, as described in Chapter 5. The “architecture” may be seen as consisting of: on the one hand, funding from bilateral and multilateral development finance bodies destined for climate change mitigation and adaptation; and, on the other, dedicated multilateral climate funds, such as the Green Climate Fund (GCF), set up expressly to support climate action. The focus here is on the financing made available from each of these sources for addressing climate change adaptation and mitigation in agriculture (crop production and livestock), forestry and fisheries.

Data on the scale of commitments between 2010 and 2014 suggest that bilateral development assistance has been the dominant source of international public finance for climate change adaptation and mitigation in agriculture, forestry and fisheries. Average annual bilateral commitments were US$1.9 billion for agriculture, US$552.7 million for forest conservation and US$37.5 million for fisheries. Bilateral funding was far larger than climate finance commitments from multilaterals (Figure 17).

Globally, the level of international support for mitigation has far surpassed finance for adaptation (Norman and Nakhooda, 2014). However, in recent years, there has been a shift towards adaptation, particularly by bilateral donors. Although the focus is also shifting for multilateral funding, in the period 2010–14 it was still dominated by mitigation, which accounted for approximately 70 percent of funding in the agriculture, forestry and fisheries sectors. Forest conservation and REDD+ have been financed mainly as a mitigation opportunity, although bilateral donors are moving towards forest interventions that support both mitigation and adaptation objectives. Funds available for fisheries are predominantly for adaptation and building resilience.

There are differences in the regional allocation of adaptation and mitigation finance. Making precise estimates is difficult because the regional allocation of about one-fifth of bilateral finance tagged for climate change is either unspecified or unclear. Of the remainder, some 62 percent of finance from dedicated climate funds has been targeted at Latin America and the Caribbean, reflecting the significant opportunities seen for reducing emissions in the forest sector in that region. Adaptation funding has concentrated on sub-Saharan Africa, the region likely to be most impacted by climate change, with 54 percent of approved dedicated climate finance for the period 2010–14. Bilateral donors have also allocated almost half of their adaptation-tagged finance to sub-Saharan Africa. While bilateral donors have focused finance on countries vulnerable to food insecurity, finance currently misses the most vulnerable countries, a fact which reflects donor concerns about those countries’ capacity to absorb and benefit from development assistance.

Bilateral donors and dedicated multilateral climate funds report a significant focus on capacity development, including policy and administrative management and institutional strengthening, across the agriculture sectors. That focus is most pronounced for the forestry sector, where 57 percent of bilateral and 75 percent of dedicated multilateral finance supports policy and administrative management, in particular for REDD+ readiness, which assists governments in developing national REDD+ plans and strategies. Similarly, in the fisheries sector, 43 percent of bilateral climate funding and more than 90 percent of multilateral climate funding were allocated to supporting policy and strengthening institutions.

Most bilateral and dedicated multilateral climate funding for agriculture supports both agricultural development and agricultural policy and administrative management objectives, although funding is spread across a wide range of sub-sectors. Some 40 percent of bilateral agricultural climate finance is tagged broadly for agricultural development, with donors focusing overwhelmingly on rural development. Bilateral donors have specifically sought to support smallholders moving from subsistence farming to producing a marketable surplus through improved irrigation and value-chains, as well as inclusive models for contract farming (Donor Tracker, 2014). Dedicated climate projects that support low-carbon and resilient crop and livestock production are few; they account for just 4 percent of total reported bilateral finance in the case of crop production and 0.1 percent in the case of livestock (see Box 25 for examples of uses of available funding).

In terms of multilateral funds, the GEF has been one of the largest funds financing climate change mitigation. The fund reported to COP21 that, since its creation in 1991, it has financed 839 projects for climate change mitigation, with more than US$5.2 billion in GEF financing in more than 167 countries, mobilizing US$32.5 billion in co-financing. The GEF has sought to develop long-term, sustainable approaches to maintaining forests. As of June 2016, the GEF had supported more than 430 forest-related projects, with US$2.7 billion in grants that leveraged an additional US$12.0 billion in co-finance. Funding for forests is steadily increasing. During the four years of the Fifth Replenishment (GEF-5), exactly US$700 million in grants was committed. In the first two years of GEF-6 (2014–18), grants of US$566 million have already been made available through 52 projects and programmes to enhance the economic, social and environmental value of all types of forests. In addition, the GEF has also launched a US$45 million integrated programme to take deforestation out of commodity supply chains.

Financing needs and prospects

Figure 17 shows that international public finance for adaptation and mitigation in the agriculture sectors averaged US$3.3 billion a year between 2010 and 2014. Available estimates of the cost of adaptation in agriculture vary widely, but are generally much higher than available publicly sourced international climate finance for the agriculture sectors. The World Bank estimates adaptation costs for the agricultural sectors alone at more than US$7 billion per year. These resources would be needed for investments in agricultural research, irrigation efficiency and expansion, and roads, in order to counteract the effects of climate change on calorie availability and child malnutrition (Nelson et al., 2010). The projected cost would be higher if the cost of improving agricultural extension services were factored in as part of responding to climate change. Factoring in the costs of GHG mitigation that is not obtained as a co-benefit of adaptation practices would add additional billions of US dollars per year in financing needs.14 Clearly, the agriculture sectors will need an increase in the level of financing that is proportionate to the adaptation needs and the mitigation ambition of countries. Not all financing will need to be international public financing, if other existing funding sources can be leveraged (see section 6.2). Nonetheless, without adequate international public climate finance allocated to the agriculture sectors, such leveraging would be difficult to implement. Here the potential magnitude of such funds going forward is assessed.

The Green Climate Fund (GCF) is the largest international climate fund and aims at allocating resources evenly between mitigation and adaptation. It is referred to in several INDCs as a key funding source. As of May 2016, countries had pledged to the GCF some US$10.3 billion, of which US$9.9 billion has been signed over to the Fund. This sum is expected to rise to at least US$100 billion in annual climate finance to developing countries by 2020. Investments in the agricultural sectors are well aligned with the GCF’s stated priorities – four of its eight strategic fund-level impacts are directly linked to the agriculture sectors. This is further reflected by the agriculture sectors being present in four out of the first eight projects approved by the GCF in November 2015, and five of the nine projects approved in June 2016.

Beyond the GCF, new pledges were announced at COP21 in Paris, in December 2015. At least US$5.6 billion has been pledged to new and existing initiatives or funds that could be at least partly eligible for use in support of agricultural, forestry and fisheries programmes. Another US$12.7 billion was pledged for other sectors, mainly energy and insurance, and US$126 billion was pledged without specifying the target sector. Information regarding the time period to which the pledges refer is, however, limited.

Recently, support has grown for cross-cutting forest and agricultural sector programmes. The GEF has announced new climate finance commitments of US$3 billion from across its focal areas, with at least US$300 million being dedicated to coastal and marine issues over the next four years. Another US$250 million will flow through the GEF’s Sustainable Forest Management/REDD+ Incentive Mechanism, which will mobilize US$750 million in grants from other focal areas to tackle the drivers of deforestation and forest degradation, while supporting the role of forests in national and local sustainable development plans. Some US$45 million will address the key global drivers of deforestation by expanding the supply of sustainably managed commodities, while more than US$116 million will help to improve food security, strengthen resilience and enhance carbon sequestration in sub-Saharan Africa ( Box 26).

The capacity challenge: from commitment to action

Even though estimates are uncertain, there is clearly a wide gap between financing needs and available resources for addressing climate risks to agriculture. Availability of resources is not the only constraint many developing countries face, however. Many countries encounter difficulties in accessing funding and in effectively deploying the resources that they have obtained.

The OECD (2015b) notes six major challenges countries face in accessing climate change adaptation finance: (a) a low level of awareness of the need for adaptation and of relevant sources of funding; (b) difficulty in meeting funds’ procedures and standards for accessing finance; © low level of capacity to design and develop projects/programmes and monitor and evaluate progress; (d) limited availability of and access to climate information; (e) a lack of coherent policies, legal and regulatory frameworks and budgets; and (f) a lack of clear priorities identified through transparent multistakeholder processes.

Problems may also arise after having accessed funds, during the implementation phase. For example, allocating and approving finance requires time, and many countries face capacity constraints in the effective management of funds. The constraints include the low absorptive capacity of low-income countries’ public financial systems, which slows the rate of disbursement.

Reporting by all donor sources indicates that commitments to the agriculture sectors are significantly higher than disbursements. Disbursements or finance released to a recipient or implementing agent is usually structured to be released over the life cycle of the project and often lags behind commitment levels. Multilateral donors have a more protracted disbursement timeframe, the result of lengthy processes for programme approval and implementation, and equally lengthy processes for transferring funds. While a number of countries have been very successful in securing funds, for most of them disbursement constraints remain a challenge that also hinders the attainment of objectives and impacts (see Figure 18, and Norman and Nakhooda, 2014).

An example of the challenges posed by the approval process is provided by the Green Climate Fund. Its project approvals have been fewer than anticipated. Funding for the first eight projects approved in November 2015 amounted to only US$168 million, with total project costs of US$624 million. The GCF Board has set a target of committing US$2.5 billion in funding in 2016; in June 2015, nine projects with a value of US$257 million in GCF resources and total cost of US$585 million, were approved. The low approval level is indicative of the challenges the GCF is facing as a new institution, the capacity constraints of the direct access entities and at the national level, staffing constraints in the GCF Secretariat, and the rigorous project preparation requirements that did not distinguish between project type and size.

A number of decisions have been taken that should expedite the preparation and approval of GCF projects. A comprehensive readiness programme and preparatory support programme have been put in place to strengthen the capacities of national designated authorities and national entities, and steps have been taken to increase GCF staff from 45 to 100 by the end of 2016. At its June 2016 meeting, the GCF Board approved the operational guidelines for its Project Preparation Facility and a simplified procedure for micro-scale and small-scale funding proposals that are assessed as low risk or no risk. These new procedures should accelerate the project approval process.

Capacity constraints, which affect both providers and recipients of funds, will need to be addressed if agricultural climate finance is to have a truly catalytic effect in terms of enhancing resilience and the sustainability of agriculture, forestry and land use.

MAKING A LITTLE GO FAR: USING CLIMATE FINANCE STRATEGICALLY

International public finance tagged for climate change will probably remain a fraction of overall investment in agriculture. To achieve impact in increasing farming systems resilience or reducing greenhouse gas emissions, climate finance must focus on using strategic leverage points to direct broader financing volumes towards climate outcomes. In particular, public funds should be oriented towards:

reinforcing the enabling environment needed to overcome barriers to the adoption of climate-smart agriculture;

supporting the mainstreaming of climate change adaptation and mitigation efforts in domestic budgets; and

unlocking private capital for climate-smart agricultural investment.

Financing the enabling environment for climate-smart agricultural development

International funding for the agriculture sectors has a significant focus on capacity development, including policy and administrative management and institutional strengthening across all the agriculture sectors. At the same time, capacity constraints are a major obstacle to the effectiveness of all climate finance mechanisms. This applies to funds such as the GEF and the GCF, where a major impediment to impact is the high cost of project development. However, even after projects are prepared and approved, disbursing funds and bringing projects to fruition can also be a challenge. Readiness funds and programmes may help strengthen the capacity of national and regional entities to receive and manage climate financing.

As highlighted in Chapter 5, there is a continued need to support the development of policies and institutions to facilitate and secure public and private investment for rural development. Climate change accentuates the need for strong institutions that support integrated management of natural resources and collective action. This also applies to policies and programmes dedicated to the prevention and management of specific climate risks and vulnerabilities, such as increased rainfall variability, extreme weather events and upsurges in plant pests and animal diseases. Early warning systems and mechanisms for sharing information along the food value chain will be critical to the success of climate-smart agricultural development.

Policies and institutions that provide appropriate information and incentives to food producers are often weak in responding to climate-related extreme events, or in overcoming barriers to the adoption of climate-smart farming practices. In the former case, carefully designed social protection programmes that guarantee a minimum income or access to food have an important role to play within a broader agricultural risk management strategy. As discussed in Chapter 3, improving smallholders’ access to financial services will be important in supporting their efforts to address climate change.

With a better enabling environment, also limited international public finance can act as a catalyst to galvanize commitments from other public and private sector sources. The broad coalition of non-governmental organizations and private corporations which signed the New York Declaration on Forests, in 2014, is one example of the catalytic role public finance can play. The coalition seeks to reduce global emissions of greenhouse gases by between 4.5 and 8.8 Gt annually (Conway et al., 2015). The public financing of efforts to reduce emissions from deforestation is likely to have played a role in catalysing this private sector participation by lowering risks linked to country participation, and improving country readiness in terms of the necessary institutional frameworks.

A core goal expressed by the private sector through the declaration is the elimination of deforestation associated with the production of agricultural commodities such as palm oil, soy, paper and beef products by 2020. Large institutional investors are also redirecting investments to align them with climate objectives, such as reducing emissions from deforestation. For example, the Norwegian Pension Fund has begun to divest shares in companies associated with unsustainable palm oil production, which can be viewed as an alignment of private financing with global climate change mitigation objectives.

Mainstreaming climate change in domestic budgets

Domestic government budgets are a key source of climate-relevant public finance. They constitute a much more significant source of public investment in agriculture than providers of international public climate finance. No comprehensive assessment is available to track climate finance from domestic budgets, and there is no agreed classification system for national climate budget tagging that permits international comparisons or aggregation. However, evidence from 11 countries indicates that domestic resources are a significant and, in some cases, even a dominant part of climate change expenditure (UNDP, 2015). Furthermore, there may be rural development funds that, strictly speaking, would not fall under climate financing but are “climate-relevant” in the sense that, through the pursuit of other policy objectives, they may influence climate change outcomes in areas such as resilience or levels of GHG emissions.

For climate-related policy goals to be achieved, domestic budgets for agricultural investments need to reflect the systematic integration of climate change considerations into policies and planning, as outlined in Chapter 5. In this respect, agricultural support policies need to be considered in the broader context of climate policy. For example, input subsidies may induce the inefficient use of synthetic fertilizers and pesticides, and increase the emission intensity of production.

A meta-analysis of climate-relevant public expenditure and institutional reviews in 20 countries in Africa, Asia and the Pacific, highlights the fact that agriculture is very prominent, second only to public works and transport, with water and irrigation being another prominent expenditure area. Significant shares of climate-relevant expenditures are channelled through local governments. The effective use of funds channelled this way requires adequate coordination with national policies and improved implementation capacities at the local level. The review showed that, while countries had made significant progress in establishing national climate policies, there had been limited integration with sector and sub-national policy, leading to a lack of coherence in how climate change is addressed. Mechanisms to ensure that policy priorities were reflected in public expenditure programmes were also lacking, as were (although some progress was noted) frameworks that assessed the performance of climate spending. As with international funding mechanisms, capacity – both technical and operational – remains an overarching challenge in many contexts (UNDP, 2015).

To ensure the full mainstreaming of climate change in public expenditure, the UNDP review recommends the adoption of a comprehensive climate financing or fiscal framework which includes: planning and costing climate change strategies and actions in the medium and longer term; employing a whole-of-government approach engaging all relevant stakeholders; bringing public sources of climate finance (domestic and international) into the national planning and budgeting system, to be delivered through country systems; and aligning private sources of climate finance with the overall policy framework. A number of countries have started making headway in strengthening their investment appraisal mechanisms to integrate climate change (Box 27).

Country-study evidence highlights the need for capacity development to allow governments to move towards the systematic integration of climate change action into their budgets (UNDP, 2015). Dedicated climate finance should support the strengthening of national systems and capacity for mainstreaming. This includes:

reviewing planning and budgeting processes and related institutional roles, to identify and address bottlenecks – in policies, incentives and institutions – that impede an integrated approach to climate change;

strengthening the capacity of relevant institutions and stakeholders at national and sub-national levels, particularly the technical and functional expertise needed to translate policies into programmes and budgets, and track and assess performance; and

enhancing transparency frameworks to demonstrate results and ensure accountability.

Further work is needed to improve methodologies for climate-relevant public expenditure reviews and effectiveness assessments, and to develop practical guidelines and tools that countries can adapt to their specific circumstances, including the integration of climate change in cost-effectiveness analyses and investment appraisal. In defining nationally appropriate investment design and appraisal mechanisms, governments can also draw on the experience of international financing institutions that have already developed approaches and protocols to mainstream climate change in their portfolios (Box 28).

Efforts to enhance the integration of climate change into domestic budgets should always be aligned within ongoing efforts to strengthen public financial and expenditure management. Just as climate change should not be considered a stand-alone issue, climate change budget mainstreaming needs to be addressed in the context of a country’s overall financial management systems.

Unlocking private capital for climate-smart agricultural investment15

Private investment is the most important source of agricultural investment (FAO, 2012). However, as discussed in Chapter 3, the lack of access to adequate and sufficient finance, which could unleash the full potential of private investment, remains a significant constraint for smallholder farmers and agricultural small and medium enterprises (SMEs). The main challenges are the transaction costs of lending to small-scale and dispersed customers with little or no financial literacy, information gaps and asymmetries regarding what constitutes viable funding propositions in agriculture, and the management of actual and perceived risks. A key challenge, and one which will be exacerbated by expected increases in climate variability, is the inability of both farmers and financiers to fully manage the impacts of seasonality on cash flows.

Adjusting food production systems to respond to climate change will require substantial upfront investments in increasing farmers’ productivity and their capacity to adapt, while reducing the emission intensity of production. This requires not only a significant increase in the amount of capital available but also longer maturities (of 5 to 7 years) and more flexible repayment schedules that are adjusted to cash flows. That would allow farmers to undertake the necessary investments to maintain current yields, produce more food on less land, and adopt practices and technologies that would increase resilience while also reducing emissions.

Climate finance can help address the constraints that prevent financial service providers from offering the types of financial services that smallholders and SMEs require to undertake climate-smart investments. It can play a catalytic role by unlocking other sources of private capital and supporting the agriculture sector in becoming part of the solution to climate change. By filling the financing gap and catalysing investment that would not happen without the right enabling conditions, climate finance can strengthen risk management mechanisms, foster development of appropriate financial products, and address the capacity constraints of both lenders and borrowers. Through strategic support, climate finance can demonstrate the viability of climate-smart agricultural investments to private investors and banks that remain reluctant to expand their lending into agriculture.

In particular, climate finance can support the design of innovative mechanisms to leverage additional sources of capital, from both public and private sources, which can be directed towards climate-smart investments. These mechanisms include:

fostering public-private partnerships to leverage the resources, expertise and capacities of different stakeholders. These partnerships can bridge the gap between potential investors and SMEs, or farmers who individually can neither approach investors nor make a strong case for their investment proposals;

designing and piloting innovative investment vehicles that can help to attract additional capital by diversifying and managing the risk return profile of different investors (e.g. layered capital structures in which public finance can absorb risks related to climate change, or extend repayment rates to better match project cash flows); and

supporting the development and bundling of a wider range of financial instruments to increase effectiveness and provide more holistic and comprehensive solutions. These include insurance products, warehouse receipts and value chain finance.

Climate finance could also fund the technical assistance that is critically needed by actors in the financial system to enhance their capacity to manage agricultural risks, and to address the specific requirements of smallholders and SMEs, whose business and financial management skills should also be strengthened so that they can take advantage of emerging financing options. Capacity support should focus on strengthening the skills of borrowers and lenders in identifying and implementing investments that enhance climate resilience and, where possible, contribute to emission reductions. Capacity support to lenders would focus on enhancing their understanding of risks in the agriculture sectors and developing customized agricultural financial products and services to support investments.

Transaction costs will continue to provide a challenge to agricultural finance for the foreseeable future. However, by taking advantage of the trend towards mobile financial services, climate finance can support and further strengthen the development and roll-out of those services that address the needs of smallholders and SMEs for climate-smart investments in remote areas.

CONCLUSIONS

Much more needs to be done to strengthen the enabling environment for climate-smart agricultural investments, mainstream climate change considerations in domestic budget allocations and implementation, and unlock private capital for climate-smart agricultural development. International climate finance can be used strategically to leverage domestic public funds and private sector financing, as well as additional international public resources.

It is still not clear what proportion of new pledges to climate financing will be directed to supporting adaptation and mitigation action in the agriculture sectors, but the amounts may be significant. The transition to sustainable, resilient, climate-smart food and agricultural systems requires adaptation to climate change and a commitment to climate change mitigation throughout the agriculture sectors. The transition will depend on action by policy-makers, civil society, farmers, herders, foresters and fisherfolk, as well as stakeholders along the food and agriculture value chains worldwide. It is vital to ensure that the climate finance available to the agriculture sectors is commensurate with the role the sector must play in ensuring food security and responding to the challenge of climate change today and in the future.

ANNEX

DATA ON INTERNATIONAL PUBLIC CLIMATE FINANCE FOR AGRICULTURE, FORESTRY AND FISHERIES

Data presented in Chapter 6 come from two datasets that are used to understand international public finance for climate change mitigation and adaptation in the agricultural sector. These are the OECD’s Creditor Reporting System (CRS) and the Climate Fund Update (CFU) of the Overseas Development Institute (ODI), United Kingdom.

The CRS data cover some dedicated climate funds as well as bilateral and multilateral commitments directed at climate change adaptation and mitigation. The CFU data focus on dedicated multilateral climate funds, which have been expressly set up to address climate change. For climate finance directed towards the agricultural sector, the CRS include many, but not all, of the dedicated climate funds considered by the CFU. The CRS data also include the climate-related portion of general development funds from multilateral institutions, whereas the CFU data do not include any finance from general development funds (see Table). The CRS includes bilateral donors’ funds; these are outside of the scope of the CFU.

As with any datasets, there are some clear limitations to using the CRS and CFU data to understand international public finance of climate change related projects in the agricultural sector. Both datasets consider some of the same climate funds. For figures and tables in this chapter, which include both CRS and CFU data, we have therefore adjusted each dataset accordingly (removing funds shown as greyed out text in the table from the respective dataset) so that as little double-counting as possible appears in the figures. It is not possible to identify and thus remove the ASAP funds from either the CRS or the CFU data.

Both the datasets are also lacking in terms of their comprehensiveness. For example, the OECD CRS dataset does not include all donor countries; it is limited to the assistance committed by OECD member states and thus exclude assistance from countries such as China. In addition, there is a lack of information on the extent to which projects and finance reported are entirely supporting climate outcomes. Numerous issues have been raised in terms of how projects are designated (“tagged”) as supporting climate change adaptation and/or mitigation (Caravani, Nakhooda and Terpstra, 2014; Michaelowa and Michaelowa, 2011).

NOTES ON THE ANNEX TABLES

KEY

The following conventions are used in the tables:

.. = data not available

0 or 0.0 = nil or negligible

blank cell = not applicable

Numbers presented in the tables may differ from the original data sources because of rounding or data processing. To separate decimals from whole numbers a full point (.) is used.

TECHNICAL NOTES

TABLE A.1

Projected changes in crop yields due to climate change for all locations worldwide

Source: Data are the same as those used in Porter et al. (2014) and Challinor et al. (2014). An updated version of the data is available at http://www.ag-impacts.org

Notes: Studies came from a broad survey of the literature, which included process-based and statistical models. There are wide methodological variations among the studies, which are based on different climate models, emissions levels and crop models. Some studies include adaptation, whereas others do not.

Reference provides the author(s) and year of the study containing estimate(s) of change in crop yields. The full citations are provided in the References to the main report.

Geographical location is the province, state, country or region to which the estimate of change in crop yield refers, using the wording and geographical classifications found in the original dataset. Some estimates are for the global level. The following notation is used: (1) the estimate is considered to be for a location in a developed region; (2) estimate for a location in a developing region; and (3) the location is global or unspecified.

Period refers to the mid-projection year – calculated from the starting year to the latest year in the simulation – and considers the time period to which it belongs. For instance, estimates from a study written in 2010 may be projections for 2050 and 2080; in this instance the midpoint is considered to be 2065 and the estimates are grouped accordingly in the bin 2050–69.

Crops (estimated yield change) reports the crops or groups of crops and, in parentheses, the estimates of the change(s) induced by climate change in the respective yield(s). Some studies report more than one estimate for a given location, time period and crop; this is due to the use of more than one combination of climate models, emissions levels, crop models, adaptation and/or no adaptation.

TABLE A.2

Net emissions and removals from agriculture, forests and other land use in carbon dioxide equivalent, 2014

Source: FAO, 2016.

Emissions from agriculture are expressed in carbon dioxide (CO2) equivalent and consist of methane (CH4) and nitrous oxide (N2O), produced by aerobic and anaerobic decomposition processes in crop and livestock production and management activities. They are computed at Tier 1 following IPCC Guidelines for National GHG Inventories. The emissions are estimated as the product of an activity level (such as number of livestock, harvested area, application of fertilizer or other) and an emissions factor from the IPCC. They include the following sub-domains: burning crop residues (CH4, N2O); burning savanna (CH4, N2O); crop residues (N2O); cultivation of organic soils (N2O); enteric fermentation (CH4); manure management (CH4, N2O); manure left on pastures (N2O); manure applied to soils (N2O); rice cultivation (CH4); and synthetic fertilizers (N2O).

Emissions/removals from forests consist of CO2 emissions from the degradation of forest lands and carbon removals (carbon sink) by land that has remained forest land from year t – 1 to year t. At the country level, forest data are either positive (net emissions) or negative (net sinks).

Emissions from net forest conversion are CO2 emissions resulting from deforestation, or the conversion of forest land to other uses.

Emissions from burning biomass consist of gases produced from the burning of biomass for the following items: humid tropical forest, other forests, and organic soils. They consist of methane (CH4), nitrous oxide (N2O) and, only in the case of organic soils, also carbon dioxide (CO2).

Emissions from cropland organic soils are those associated with carbon losses from drained organic soils of croplands.

Emissions from grassland organic soils are those associated with carbon losses from drained organic soils of grasslands.

TABLE A.3

Agricultural emissions in CO2 equivalent by source, 2014

Source: FAO, 2016.

Emissions from burning crop residues consist of methane (CH4) and nitrous oxide (N2O) gases produced by the combustion of a percentage of crop residues burned on-site. The mass of fuel available for burning should be estimated taking into account the fractions removed before burning due to animal consumption, decay in the field, and use in other sectors (e.g. biofuel, domestic livestock feed, building materials). Emissions are estimated as the product of an IPCC emissions factor and activity data (the amount of biomass burned, which is calculated from harvested area of wheat, maize, rice and sugarcane).

Emissions from burning of savanna consist of methane (CH4) and nitrous oxide (N2O) gases produced from the burning of vegetation biomass in the following five land cover types: savanna, woody savanna, open shrublands, closed shrublands and grasslands. Emissions are calculated as the IPCC emissions factor times activity data (total mass of fuel burned using the Global Fire Emission Database).

Emissions from crop residues consist of direct and indirect nitrous oxide (N2O) emissions from nitrogen (N) in crop residues and forage/pasture renewal left on agricultural fields by farmers. Direct emissions are estimated as the product of activity level (crop yield and harvested area) and an emissions factor from the IPCC. Crops considered include barley, beans-dry, maize, millet, oats, potatoes, rice-paddy, rye, sorghum, soybeans and wheat. Indirect emissions are also estimated; they are the N in crop residues forage/pasture renewal that is lost through runoff and leaching.

Emissions from cultivation of organic soils are those associated with nitrous oxide gas from cultivated organic soils (both cropland and grassland organic soils). Emissions are estimated as the product of activity level (area of cultivated organic soils) and an emissions factor from the IPCC.

Emissions from enteric fermentation consist of methane gas (CH4) produced in digestive systems of livestock (both ruminants and non-ruminants). The emissions are estimated as the product of activity level (number of livestock) and an emissions factor from the IPCC. Livestock considered include buffaloes, sheep, goats, camels, llamas, horses, mules, asses, pigs, dairy and non-dairy cattle and poultry.

Emissions from manure management consist of methane (CH4) and nitrous oxide gases from aerobic and anaerobic decomposition processes. The emissions are estimated as the product of activity level (number of livestock) and an emissions factor from the IPCC. Livestock considered include buffaloes, sheep, goats, camels, llamas, horses, mules, asses, ducks, turkeys, dairy and non-dairy cattle, chickens (layers and broilers) and market and breeding swine.

Emissions from manure left on pastures consist of direct and indirect nitrous oxide (N2O) emissions from manure nitrogen (N) left on pastures by grazing livestock. Livestock data cover the following animal categories: buffaloes, sheep, goats, camels, llamas, horses, mules, asses, ducks, turkeys, dairy and non-dairy cattle, chickens (layers and broilers) and market and breeding swine.

Emissions from manure applied to soils consist of direct and indirect nitrous oxide (N2O) emissions from manure nitrogen (N) added to agricultural soils by farmers. Livestock data cover the following animal categories: buffaloes, sheep, goats, camels, llamas, horses, mules, asses, ducks, turkeys, dairy and non-dairy cattle, chickens (layers and broilers) and market and breeding swine.

Emissions from rice cultivation consist of methane gas (CH4) emitted by anaerobic decomposition of organic matter in paddy fields. The emissions are estimated as the product of activity level (harvested area of rice paddy) and an emissions factor from the IPCC.

Emissions from synthetic fertilizers consist of direct and indirect nitrous oxide (N2O) emissions from nitrogen (N) added to agricultural soils by farmers. The emissions are estimated as the product of activity level (application of nitrogen fertilizer) and an emissions factor from the IPCC.

COUNTRY GROUPS AND REGIONAL AGGREGATES

Tables A.2 and A.3 present country groups and regional aggregates for all indicators. They are calculated for the country groupings and regions as described below. World and regional totals may differ slightly from those available in FAOSTAT.

For Tables A.2 and A.3, as well as some figures and tables in the text, regional groupings and the designation of developing and developed regions follow a similar classification to the UNSD M49 classification of the United Nations Statistics Division, available at unstats.un.org/unsd/methods/m49/m49.htm.

The main difference is that “Countries and territories in developed regions”, as used here, includes countries designated as being in developed regions by the UNSD M49, as well as countries in Central Asia (Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan). Data for China, mainland exclude data for Hong Kong Special Administrative Region of China and Macao Special Administrative Region of China.

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McCarthy, M., Best, M. & Betts, R. 2010. Climate change in cities due to global warming and urban effects. Geophysical Research Letters, 37(9).

Meybeck, A., Azzu, N., Doyle, M. & Gitz V. 2012. Agriculture in National Adaptation Programmes of Action (NAPA). In: A. Meybeck, J. Lankoski, S. Redfern, N. Azzu & V. Gitz. Building resilience for adaptation to climate change in the agriculture sector. Proceedings of a joint FAO/OECD Workshop. Rome, FAO.

OECD. 2015. Aligning policies for a low-carbon economy. Paris.

OECD. 2016. Producer and consumer support estimates database of the OECD. (Available at: http://www.oecd.org/tad/agricultural-policies/producerandconsumersupportestimatesdatabase.htm). Paris.

Place, F. & Meybeck, A. 2013. Food security and sustainable resource use – what are the resource challenges to food security? Background paper for the conference “Food Security Futures: Research Priorities for the 21st Century”, 11–12 April 2013, Dublin, Ireland.

Rosenzweig, C., Elliott, J., Deryng, D., Ruane, A.C., Müller, C., Arneth, A., Boote, K.J., Folberth, C., Glotter, M., Khabarov, N., Neumann, K., Piontek, F., Pugh, T.A.M., Schmid, E., Stehfest, E., Yang, H. & Jones, J.W. 2014. Assessing agricultural risks of climate change in the 21st century in a global gridded crop model intercomparison. Proceedings of the National Academy of Sciences, 111(9): 3268–3273.

Sorda, G., Banse, M. & Kemfert, C. 2010. An overview of biofuel policies across the world. Energy Policy, 38 (11): 6977–6988.

Thomson, L.J., Macfadyen, S. & Hoffmann, A.A. 2010. Predicting the effects of climate change on natural enemies of agricultural pests. Biological Control, 52 (3): 296–306.

UNFCCC (United Nations Framework Convention on Climate Change). 2015. NAMA Registry. (Available at: http://www4.unfccc.int/sites/nama/SitePages/Home.aspx).

UNFCCC. 2016a. NAPAs received by the secretariat. (Available at: http://unfccc.int/adaptation/workstreams/national_adaptation_programmes_of_action/items/4585.php).

UNFCCC. 2016b. Focus: Mitigation – NAMAs, Nationally Appropriate Mitigation Actions.

UNISDR (United Nations International Strategy for Disaster Reduction) and OECD. 2013. Disaster risk reduction – donor effort. A survey of development co-operation providers. (Available at http://www.preventionweb.net/files/34577_34577donoreffortondisasterriskreduc.pdf).

Wilkes, A., Tennigkeit, T. & Solymosi, K. 2013. National planning for GHG mitigation in agriculture. A guidance document. Rome, FAO.

World Bank. 2013. World Development Report 2013. Risk and opportunity: managing risk for development. Washington DC.

Wu, M. & Salzman, J. 2014. The next generation of trade and environment conflicts: the rise of green industrial policy. Scolarship Law Article, Northwestern University Law Review, 108(2): 401–474.

CHAPTER 6

Buchner, B.K., Trabacchi, C., Mazza, F., Abramskiehn, D. & David Wang. 2015. Global Landscape of climate finance 2015. Venice, Italy, Climate Finance Initiative.

Cambodia Climate Change Alliance. 2015. Planning and budgeting for climate change in Ministry of Agriculture, Forestry and Fisheries. Cambodia Climate Change Alliance Phnom Penh.

Caravani A., Nakhooda S. & Terpstra P. 2014, The Rio markers in practice. London and Washington, ODI and World Resources Institute.

Cattaneo, A., Lubowski, R., Busch, J., Creed, A., Strassburg, B., Boltz, F. & Ashton, R. 2010. On international equity in reducing emissions from deforestation. Environmental Science & Policy, 13(8): 742–753.

Conway, D., Keenlyside, P., Roe, S., Streck, C., Vargas-Victoria, G. & Varns, T. 2015. Progress on the New York Declaration on Forests – an assessment framework and initial report. Prepared by Climate Focus, in collaboration with Environmental Defense Fund, Forest Trends, The Global Alliance for Clean Cookstoves, and The Global Canopy Program.

DONOR Tracker. 2014. Analyzing development strategies. (Available at http://www.donortracker.org/).

FAO. 2012. The State of Food and Agriculture. Investing in agriculture for a better future. Rome.

Government of Cambodia. 2016. Report on Climate Public Expenditure Review 2012–14. Ministry of Economy and Finance, Phnom Penh.

Government of Thailand. 2014. Strengthening the governance of climate change finance in Thailand. Country Brief.

IFPRI (International Food Policy Research Institute). 2015. Statistics on Public Expenditures for Economic Development (SPEED). (Available at https://www.ifpri.org/).

Mery, G., Katila, P., Galloway, G., Alfaro, R.I., Kanninen, M., Lobovikov, M., & Varjo, J. 2010. Forests and Society – Responding to Global Drivers of Change. World Series Volume 25. Vienna, IUFRO (International Union of Forestry Research Organizations).

Michaelowa A. & Michaelowa, K. 2011. Coding error or statistical embellishment? The political economy of reporting climate aid. World Development, 39 (11): 2010–2020.

Nelson, G.C., Rosegrant, M.W., Palazzo, A., Gray, I., Ingersoll, C., Robertson, R., Tokgoz, S., Zhu, T., Sulser, T.B., Ringler, C., Msangi, S. & You L. 2010. Food security, farming, and climate change to 2050. Washington, DC, IFPRI.

Norman, M. & Nakhooda, S. 2014. [_ The State of REDD+ Finance _]. Washington, DC, Center for Global Development.

ODI (Overseas Development Institute). 2015. Climate Funds Update dataset. (Available at: http://www.climatefundsupdate.org/).

OECD (Organisation for Economic Co-operation and Development). 2015a. Credit Reporting System (CRS). (Available at: https://stats.oecd.org/Index.aspx?DataSetCode=CRS1).

OECD. 2015b. Toolkit to enhance access to adaptation finance: for developing countries that are vulnerable to adverse effects of climate change, including LIDCs, SIDS and African states. Report to the G20 Climate Finance Study Group prepared by OECD in collaboration with GEF. Paris.

United Nations. 2013. National Accounts Main Aggregates Database. (Available at: http://unstats.un.org/unsd/snaama/dnlList.asp).

UNDP (United Nations Development Programme). 2015. Budgeting for climate change: how governments have used national budgets to articulate a response to climate change. Bangkok.

World Bank. 2015. Mainstreaming climate action within financial institutions: five voluntary principles. (Available at http://www.worldbank.org/content/dam/Worldbank/document/Climate/5Principles.pdf).

World Bank. 2016. Making Climate Finance Work in Agriculture. Background paper prepared for The State of Food and Agriculture 2016, Washington, D.C. (unpublished).

STATISTICAL ANNEX

Abraha, M.G. & Savage, M.J. 2006. Potential impacts of climate change on grain yield of maize for the midlands of KwaZulu-Natal, South Africa. Agriculture Ecosystems and Environment, 115(1–4): 150–160.

Alexandrov, V. & Hoogenboom, G. 2000. The impact of climate variability and change on crop yield in Bulgaria. Agricultural and Forest Meteorology, 104(4): 315–327.

Arndt, C., Strzepeck, K., Tarp, F., Thurlow, J., Fant IV, C. & Wright, L. 2011. Adapting to climate change: an integrated biophysical and economic assessment for Mozambique. African Regional Perspectives, 6(1): 7–20.

Berg, A., Noblet-Ducoudre, M. de. Sultan, B., Langaigne, M. & Guimberteau, M. 2013. Projections of climate change impacts on potential C4 crop productivity over tropical regions. Agricultural and Forest Meteorology, 170: 89–102.

Brassard, J.P. & Singh, B. 2007. Effects of climate change and CO2 increase on potential agricultural production in Southern Québec, Canada. Climate Research, 34: 105–117.

Brassard, J.P. & Singh, B. 2008. Impacts of climate change and CO2 increase on crop yields and adaptation options for Southern Quebec, Canada. Mitigation and Adaptation Strategies for Global Change, 13: 241–265.

Butt, T.A., McCarl, B.A., Angerer, J., Dyke, P.T. & Stuth, J.W. 2005. The economic and food security implications of climate change in Mali. Climatic Change, 68(3): 355–378.

Calzadilla, A., Zhu, T., Rehdanz, K., Tol, R.S.J. & Ringer, C. 2009. Economywide impacts of climate change on agriculture in Sub-Saharan Africa. Washington, DC, International Food Policy Research Institute (IFPRI) Discussion Paper No. 873. Washington, DC, IFPRI.

Challinor, A.J., Watson, J., Lobell, D.B., Howden, S.M., Smith, D.R. & Chhetri, N. 2014. A meta-analysis of crop yield under climate change and adaptation. Nature Climate Change, 4: 287–291.

Chhetri, N., Easterling, W.E., Terando, A. & Mearns, L. 2010. Modeling path dependence in agricultural adaptation to climate variability and change. Annals of the Association of American Geographers, 100(4): 894–907.

Ciscar, J., Iglesias, A., Feyen, L., Szabo, L., Regemorter, D., Amelung, B., Nicholls, R., Watkiss, P., Christensen, O., Dankers, R., Garrote, L., Goodess, C., Hunt, A., Moreno, A., Richards, J. & Soria, A. 2011. Physical and economic consequences of climate change in Europe. Proceedings of the National Academy of Sciences, 108: 2678–2683.

Deryng, D., Sacks, W.J., Barford, C.C. & Ramankutty, N. 2011. Simulating the effects of climate and agricultural management practices on global crop yield. Global Biogeochemical Cycles, 25: GB2006.

FAO. 2016d. FAOSTAT. Online Statistical Database (retrieved 30 July 2016) (available at http://faostat.fao.org/).

Giannakopoulos, C., Le Seger, P., Bindi, M., Moriondo, M., Kostopoulou, E. & Goodess, C. 2009. Climatic changes and associated impacts in the Mediterranean resulting from a 2 °C global warming. Global and Planetary Change, 68: 209–224.

Hermans, C., Geijzendorffer, I., Ewert, F., Metzger, M., Vereijken, P., Woltjer, G. & Verhgen, A. 2010. Exploring the future of European crop production in a liberalized market, with specific consideration of climate climate and the regional competitiveness. Ecological Modeling, 221: 2177–2187.

Iqbal, M.A., Eitzinger, J., Formayer, H., Hassan, A. & Heng, L.K. 2011. A simulation study for assessing yield optimization and potential for water reduction for summer-sown maize under different climate change scenarios. Journal of Agricultural Science, 149: 129–143.

Izaurralde, R., Rosenberg, N.J., Brown, R.A. & Thomson, A.M. 2001. Integrated assessment of Hadley Center (HadCM2) climate-change impacts on agricultural productivity and irrigation water supply in the conterminous United States Part II. Regional agricultural production in 2030 and 2095. Agricultural and Forest Meteorology, 117: 97–122.

Kim, C., Lee, S., Jeong, H., Jang, J., Kim, Y. & Lee, C. 2010. Impacts of climate change on Korean agriculture and its counterstrategies. Seoul, Korea Rural Economic Institute.

Lal, M. 2011. Implications of climate change in sustained agricultural productivity in South Asia. Regional Environmental Change, 11(Suppl. 1): S79–S94.

Li, X., Takahashi, T., Nobuhiro, S. & Kaiser, H.M. 2011. The impact of climate change on maize yields in the United States and China. Agricultural Systems, 104(4): 348–353.

Lobell, D.B., Burke, M.B., Tebaldi, C., Mastrandrea, M.D., Falcon, W.P. & Naylor, R.L. 2008. Prioritizing climate change adaptation needs for food security in 2030. Science: 319: 607–610.

Moriondo, M., Bindi, M., Kundzewicz, Z., Szwed, M., Chorynski, A., Matczak, P., Radziejewski, M., McEvoy, D. & Wreford, A. 2010. Impact and adaptation opportunities for European agriculture in response to climatic change and variability. Mitigation and Adaptation in Strategies for Global Change, 15: 657–679.

Müller, C., Bondeau, A., Popp, A., Waha, K. & Fadar, M. 2010. Climate change impacts on agricultural yields. Background note for the World Development Report 2010. Development and climate change. Potsdam Institute for Climate Impact Research (PIK), Washington, DC, World Bank.

Osborne, T.M., Rose, G. & Wheeler, T. 2013. Variation in the global-scale impacts of climate change on crop productivity due to climate model uncertainty and adaptation. Agricultural and Forest Meteorology, 170: 183–194.

Peltonen-Sainio, P., Jauhiainen, L. & Hakala, K. 2011. Crop responses to temperature and precipitation according to long-term multi-location trials at high-latitude conditions. The Journal of Agricultural Science, 149(1): 49–62.

Piao, S., Ciais, P., Huang, Y., Shen, Z., Peng, S., Li, J., Zhou, L., Liu, H., Ma, Y., Ding, Y., Friedlingstein, P., Liu, C., Tan, K., Yu, Y., Zhang, T. & Fang, J. 2010. The impacts of climate change on water resources and agriculture in China. Nature, 467: 43–51.

Porter, J.R., Xie, L., Challinor, A.J., Cochrane, K., Howden, S.M., Iqbal, M.M., Lobell, D.B. & Travasso, M.I. 2014. Food security and food production systems. In: C.B. Field, V.R. Barros, D.J. Dokken, K.J. Mach, M.D. Mastrandrea, T.E. Bilir, M. Chatterjee, K.L. Ebi, Y.O. Estrada, R.C. Genova, B. Girma, E.S. Kissel, A.N. Levy, S. MacCracken, P.R. Mastrandrea & L.L. White, eds. Climate change 2014: impacts, adaptation, and vulnerability. Part A: global and sectoral aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK, and New York, USA, Cambridge University Press.

Ringler, C., Zhu, T., Cai, X., Koo, J. & Wang, D. 2010. Climate change impacts on food security in sub-Saharan Africa. IFPRI Discussion Paper No. 01042. Washington, DC, IFPRI.

Rowhanji, P., Lobell, D., Lindermann, M. & Ramankutty, N. 2011. Climate variability and crop production in Tanzania. Agriculture and Forest Meteorology, 151: 449–460.

Schlenker, W. & Roberts, M.J. 2009. Nonlinear temperature effects indicate severe damages to U.S. crop yields under climate change. Proceedings of the National Academy of Sciences, 106(37): 15594–15598.

Shuang-He, S., Shen-Bin, Y., Yan-Xia, Z., Yin-Long, X., Xiao-Yan, Z., Zhu-Yu, W., Juan, L. & Wei-Wei, Z. 2011. Simulating the rice yield change in the middle and lower reaches of the Yangtze River under SRES B2 scenario. Acta Ecologica Sinica, 31(1): 40–48.

Southworth, J., Randolph, J.C., Habeck, M., Doering, O.C., Pfeifer, R.A., Rao, D.G. & Johnston, J.J. 2000. Consequences of future climate change and changing climate variability on maize yields in the midwestern United States. Agriculture, Ecosystems & Environment, 82: 139–158.

Tan, Z., Tieszen, L.L., Liu, S. & Tachie-Obeng, E. 2010. Modeling to evaluate the response of savanna-derived cropland to warming-drying stress and nitrogen fertilizers. Climatic Change, 100: 703–715.

Tao, F. & Zhang, Z. 2010. Adaptation of maize production to climate change in North China Plain: quantify the relative contributions of adaptation options. European Journal of Agronomy, 33(3):103–116.

Tao, F. & Zhang, Z. 2011. Impacts of climate change as a function of global mean temperature: maize productivity and water use in China. Climatic Change, 105: 409–432.

Tao, F., Zhang, Z., Liu, J. & Yokozawa, M. 2009. Modelling the impacts of weather and climate variability on crop productivity over a large area: a new super ensemble-based probabilistic projection. Agricultural and Forest Meteorology, 149: 1266–1278.

Thornton, P.K., Jones, P.G., Alagarswamy, G. & Andresen, J. 2009. Spatial variation of crop yield response to climate change in East Africa. Global Environmental Change, 19: 54–65.

Thornton, P.K., Jones, P.G., Alagarswamy, G. & Andresen, J. & Herrero, M. 2010. Adapting to climate change: agricultural system and household impacts in East Africa. Agricultural Systems, 103: 73–82.

Thornton, P.K., Jones, P.G., Ericksen, P.J. & Challinor, A.J. 2011. Agriculture and food systems in sub-Saharan Africa in a 4 °C+ world. Philosophical Transactions of the Royal Society A, 369: 117–136.

Tingem, M. & Rivington, M. 2009. Adaptation for crop agriculture to climate change in Cameroon: turning on the heat. Mitigation and Adaptation Strategies for Global Change, 14: 153–168.

Walker, N.J. & Schulze, R.E. 2008. Climate change impacts on agro-ecosystem sustainability across three climate regions in the maize belt of South Africa. Agriculture, Ecosystems & Environment, 124: 114–124.

Wang, M., Li, Y., Ye, W., Bornman, J. & Yan, X. 2011. Effects of climate change on maize production, and potential adaptation measures: a case study in Jilin Province, China. Climate Research, 46: 223–242.

Xiong, W., Lin, E., Ju, H. & Xu, Y. 2007. Climate change and critical thresholds in China’s food security. Climatic Change, 81: 205–221.

Xiong, W., Conway, D., Lin, E. & Holman, I. 2009. Potential impacts of climate change and climate variability on China’s rice yield and production. Climate Research, 40: 23–35.

SPECIAL CHAPTERS OF THE STATE OF FOOD AND AGRICULTURE

Each issue of this report since 1957 has included one or more special studies on problems of longer-term interest. Special chapters in earlier issues have covered the following subjects:

1957 Factors influencing the trend of food consumption

Postwar changes in some institutional factors affecting agriculture

1958 Food and agricultural developments in Africa south of the Sahara

The growth of forest industries and their impact on the world’s forests

1959 Agricultural incomes and levels of living in countries at different stages of economic development

Some general problems of agricultural development in less-developed countries in the light of postwar experience

1960 Programming for agricultural development

1961 Land reform and institutional change

Agricultural extension, education and research in Africa, Asia and Latin America

1962 The role of forest industries in the attack on economic underdevelopment

The livestock industry in less-developed countries

1963 Basic factors affecting the growth of productivity in agriculture

Fertilizer use: spearhead of agricultural development

1964 Protein nutrition: needs and prospects

Synthetics and their effects on agricultural trade

1966 Agriculture and industrialization

Rice in the world food economy

1967 Incentives and disincentives for farmers in developing countries

The management of fishery resources

1968 Raising agricultural productivity in developing countries through technological improvement

Improved storage and its contribution to world food supplies

1969 Agricultural marketing improvement programmes: some lessons from recent experience

Modernizing institutions to promote forestry development

1970 Agriculture at the threshold of the Second Development Decade

1971 Water pollution and its effects on living aquatic resources and fisheries

1972 Education and training for development

Accelerating agricultural research in the developing countries

1973 Agricultural employment in developing countries

1974 Population, food supply and agricultural development

1975 The Second United Nations Development

Decade: mid-term review and appraisal

1976 Energy and agriculture

1977 The state of natural resources and the human environment for food and agriculture

1978 Problems and strategies in developing regions

1979 Forestry and rural development

1980 Marine fisheries in the new era of national jurisdiction

1981 Rural poverty in developing countries and means of poverty alleviation

1982 Livestock production: a world perspective

1983 Women in developing agriculture

1984 Urbanization, agriculture and food systems

1985 Energy use in agricultural production

Environmental trends in food and agriculture

Agricultural marketing and development

1986 Financing agricultural development

1987–88 Changing priorities for agricultural science and technology in developing countries

1989 Sustainable development and natural resource management

1990 Structural adjustment and agriculture

1991 Agricultural policies and issues: lessons from the 1980s and prospects for the 1990s

1992 Marine fisheries and the law of the sea: a decade of change

1993 Water policies and agriculture

1994 Forest development and policy dilemmas

1995 Agricultural trade: entering a new era?

1996 Food security: some macroeconomic dimensions

1997 The agroprocessing industry and economic development

1998 Rural non-farm income in developing countries

2000 World food and agriculture: lessons from the past 50 years

2001 Economic impacts of transboundary plant pests and animal diseases

2002 Agriculture and global public goods ten years after the Earth Summit

2003–04 Agricultural biotechnology: meeting the needs of the poor?

2005 Agriculture trade and poverty: can trade work for the poor?

2006 Food aid for food security?

2007 Paying farmers for environmental services

2008 Biofuels: prospects, risks and opportunities

2009 Livestock in the balance

2010–11 Women in agriculture: closing the gender gap for development

2012 Investing in agriculture for a better future

2013 Food systems for better nutrition

2014 Innovation in family farming

2015 Social protection and agriculture: breaking the cycle of rural poverty

1 Note: “Global temperature” is an average for the whole planet for a whole year. The Arctic region will warm more rapidly than the global mean, and mean warming over land will be larger than over the ocean. There will be more frequent episodes of high temperature extremes over most land areas (IPCC, 2014).

2 In the datasets analysed, more estimates are available for developing countries than developed countries. Among the developing regions, the largest number of estimates is for locations in sub-Saharan Africa, followed by East Asia and the Pacific, and South Asia. A smaller share of estimates is provided for locations in Latin America and the Caribbean, North Africa and West Asia. In terms of crops, most estimates are for maize or wheat yields, followed by rice and soybean. For most country groups, the number of projections for 2090–2109 is very limited: only five for the developed countries and 16 for developing countries; all of the 16 projections for developing countries refer to sub-Saharan Africa, and all suggest declines in crop yields of more than 10 percent. However, they are derived from only two studies.

3 The Agricultural Model Intercomparison and Improvement Project is a framework linking climate, crops, livestock and economics. It provides analyses at field-to-regional scales and includes simulations with guided climate sensitivity tests and climate change scenarios. Protocols of AgMIP have helped to narrow the uncertainty and understand the reasons for differences in modelling outcomes and projections of climate change impacts on food security.

4 See for Ethiopia: Asfaw, Coromaldi and Lipper (2015a,b); Niger: Asfaw, DiBattista and Lipper (2015); Malawi: Asfaw, Maggio and Lipper (2015); United Republic of Tanzania: Arslan, Belotti and Lipper (2016); Zambia: Arslan et al. (2015)

5 The baseline scenario of IFPRI’s IMPACT model used for these estimations projects a total of about 1 billion undernourished people by 2050, explaining why an impact of 12 percent on account of introducing nitrogen-efficient crop varieties would amount to a reduction in the number of people at risk of hunger by 124 million.

6 The NPV of an investment is the difference between the present value of cash inflows and outflows

7 Lal et al. (2004) estimate these co-benefits at a ratio of 0.07 unit of dry matter (DM) per soil organic carbon unit (≈ 0.07 t DM/t SOC).

8 A range of global estimates of sequestration potential at different levels of costs has been published since the IPCC’s Fourth Assessment Report of 2007. The estimates differ widely. For carbon values up to US$20 a tonne, they range from 0.12 to 3.03 GtCO2-eq per year. For values up US$100 per tonne, they range from 0.49 to 10.6 GtCO2-eq (Smith et al., 2014).

9 A total of 161 INDCs were submitted to the UNFCCC, corresponding to 188 countries (the European Union INDC corresponds to 28 countries). Libya, the Democratic People’s Republic of Korea, Nicaragua, Palestine, the Syrian Arab Republic, Timor-Leste and Uzbekistan have not yet submitted INDCs. On 19 April 2016, Panama submitted its NDC, which is not included in this analysis.

10 In the context of mitigation, emissions from the “agriculture sector” – in accordance with IPCC terminology – includes emissions from enteric fermentation, manure management, rice cultivation, prescribed burning of savannas and grassland, and from soils (i.e. agricultural emissions). Emissions related to forest and other land uses are covered under LULUCF.

11 Agricultural production support estimates (PSE) are taken from the Producer and Consumer Support Estimates database of the OECD (2016). The database includes estimates for nine non-OECD countries: Brazil, China, Colombia, Indonesia, Kazakhstan, Russian Federation, South Africa, Ukraine, and Viet Nam.

12 Estimate for about 100 developing countries using IFPRI (2015) and adjusted from constant 2005 to constant 2012 dollars using United Nations (2013).

13 This section draws on Norman & Hedger (2016), a background paper prepared for The State of Food and Agriculture 2016.

14 Based on IPCC’s economic potential for mitigation, presented in Chapter 4, realizing 1 GtCO2-eq reduction in annual emissions (which is just a fraction of the economic mitigation potential at the lower cost estimate of up to US$20 per tonne of CO2-eq) would cost billions of dollars per year. Reducing emissions from deforestation, which is thought to be among the most cost-effective options, is still estimated to cost annually US$4–10 per tonne of CO2-eq reduction, without accounting for transaction costs (Cattaneo et al., 2010). If countries improve policy coherence with climate objectives, then financial costs may be lower, but some trade-offs will remain that require financing.

15 Based on World Bank (2016).


The State of Food and Agriculture 2016 (SOFA): Climate change, agriculture and f

The 2016 SOFA report presents evidence on today and tomorrow’s impact of climate change on agriculture and food systems. The report assesses the options to make agriculture and food systems resilient to climate change impacts, while minimizing environmental impacts. It shows that making agriculture and food systems sustainable is both economically and technically feasible. However barriers to the adoption of appropriate technologies and management practices will have to be lowered, especially for smallholder farmers and women farmers amongst them. Likewise, an overhaul is needed of agricultural and food policies to shift incentives in favour of investments, worldwide, in sustainable technologies and practices.

  • ISBN: 9789251093740
  • Author: FAO
  • Published: 2016-11-09 11:20:23
  • Words: 58356
The State of Food and Agriculture 2016 (SOFA): Climate change, agriculture and f The State of Food and Agriculture 2016 (SOFA): Climate change, agriculture and f