Summary
Background
One of the most important consequences of climate change could be its effects on agriculture. Although much research has focused on questions of food security, less has been devoted to assessing the wider health impacts of future changes in agricultural production. In this modelling study, we estimate excess mortality attributable to agriculturally mediated changes in dietary and weight-related risk factors by cause of death for 155 world regions in the year 2050.
Methods
For this modelling study, we linked a detailed agricultural modelling framework, the International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT), to a comparative risk assessment of changes in fruit and vegetable consumption, red meat consumption, and bodyweight for deaths from coronary heart disease, stroke, cancer, and an aggregate of other causes. We calculated the change in the number of deaths attributable to climate-related changes in weight and diets for the combination of four emissions pathways (a high emissions pathway, two medium emissions pathways, and a low emissions pathway) and three socioeconomic pathways (sustainable development, middle of the road, and more fragmented development), which each included six scenarios with variable climatic inputs.
Findings
The model projects that by 2050, climate change will lead to per-person reductions of 3·2% (SD 0·4%) in global food availability, 4·0% (0·7%) in fruit and vegetable consumption, and 0·7% (0·1%) in red meat consumption. These changes will be associated with 529 000 climate-related deaths worldwide (95% CI 314 000–736 000), representing a 28% (95% CI 26–33) reduction in the number of deaths that would be avoided because of changes in dietary and weight-related risk factors between 2010 and 2050. Twice as many climate-related deaths were associated with reductions in fruit and vegetable consumption than with climate-related increases in the prevalence of underweight, and most climate-related deaths were projected to occur in south and east Asia. Adoption of climate-stabilisation pathways would reduce the number of climate-related deaths by 29–71%, depending on their stringency.
Interpretation
The health effects of climate change from changes in dietary and weight-related risk factors could be substantial, and exceed other climate-related health impacts that have been estimated. Climate change mitigation could prevent many climate-related deaths. Strengthening of public health programmes aimed at preventing and treating diet and weight-related risk factors could be a suitable climate change adaptation strategy.
Funding
Oxford Martin Programme on the Future of Food.
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References
- 1.
Managing the health effects of climate change: Lancet and University College London Institute for Global Health Commission.Lancet. 2009; 373: 1693-1733
- 2.
Human health: impacts, adaptation and co-benefits.in: 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 Interngovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK, and New York, NY, USA2014: 709-754
- 3.
Food security and food production systems.in: Climate change 2014: impacts, adaptation and vulnerability. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK, and New York, NY, USA2014: 485-533
- 4.
Human health.in: Climate Change 2007: impacts, adaptation and vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK2007: 391-431
- 5.
Assessing agricultural risks of climate change in the 21st century in a global gridded crop model intercomparison.Proc Natl Acad Sci USA. 2014; 111: 3268-3273
- 6.
Climate change effects on agriculture: economic responses to biophysical shocks.Proc Natl Acad Sci. 2014; 111: 3274-3279
- 7. Food security, farming, and climate change to 2050: scenarios, results, policy options. International Food Policy Research Institute, Washington, DC2010
- 8.
Climate change impacts on global food security.Science. 2013; 341: 508-513
- 9.
Linking agriculture and health in low-and middle-income countries: an interdisciplinary research agenda.Proc Nutr Soc. 2012; 71: 222-228
- 10.
Feeding the world healthily: the challenge of measuring the effects of agriculture on health.Philos Trans R Soc Lond B Biol Sci. 2010; 365: 3083-3097
- 11. Bringing agriculture to the table: how agriculture and food can play a role in preventing chronic disease. The Chicago Council on Global Affairs, Chicago2011
- 12. Diet, nutrition, and the prevention of chronic diseases: report of a WHO Study Group. World Health Organization, Geneva1990
- 13.
A comparative risk assessment of burden of disease and injury attributable to 67 risk factors and risk factor clusters in 21 regions, 1990–2010: a systematic analysis for the Global Burden of Disease Study 2010.Lancet. 2012; 380: 2224-2260
- 14.
Global and regional mortality from 235 causes of death for 20 age groups in 1990 and 2010: a systematic analysis for the Global Burden of Disease Study 2010.Lancet. 2012; 380: 2095-2128
- 15.
The future of food demand: understanding differences in global economic models.Agric Econ. 2014; 45: 51-67
- 16.
Food consumption trends and drivers.Philos Trans R Soc B Biol Sci. 2010; 365: 2793-2807
- 17.
Projecting future crop productivity for global economic modeling.Agric Econ. 2014; 45: 37-50
- 18.
Fruit and vegetable consumption and risk of stroke: a meta-analysis of cohort studies.Neurology. 2005; 65: 1193-1197
- 19.
Fruit and vegetable consumption and risk of coronary heart disease: a meta-analysis of cohort studies.J Nutr. 2006; 136: 2588-2593
- 20. Food, nutrition, physical activity, and the prevention of cancer: a global perspective. American Institute for Cancer Research, Washington, DC2007
- 21.
Red and processed meat consumption and risk of incident coronary heart disease, stroke, and diabetes mellitus: a systematic review and meta-analysis.Circulation. 2010; 121: 2271-2283
- 22.
Red and processed meat consumption and risk of stroke: a meta-analysis of prospective cohort studies.Eur J Clin Nutr. 2013; 67: 91-95
- 23.
Body-mass index and mortality among 1.46 million white adults.N Engl J Med. 2010; 363: 2211-2219
- 24.
Body-mass index and cause-specific mortality in 900 000 adults: collaborative analyses of 57 prospective studies.Lancet. 2009; 373: 1083-1096
- 25. International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT): model description. International Food Policy Research Institute, Washington2012
- 26.
The International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT): model description for version 3. IFPRI Discussion Paper 1483. 2015. Washington, DC: International Food Policy Research Institute (IFPRI).(accessed Jan 18, 2016).
- 27.
A new scenario framework for climate change research: background, process, and future directions.Clim Change. 2013; 122: 363-372
- 28.
A new scenario framework for climate change research: scenario matrix architecture.Clim Change. 2013; 122: 373-386
- 29.
Long-term economic growth and environmental pressure: reference scenarios for future global projections. Organisation for Economic Co-operation and Development.(accessed Jan 18, 2015).
- 30.
The human core of the shared socioeconomic pathways: population scenarios by age, sex, and level of education for all countries to 2100.Glob Environ Change. 2014; (published online July 4.)https://doi.org/10.1016/j.gloenvcha.2014.06.004
- 31.
Meeting report of the workshop on the nature and use of new socioeconomic pathways for climate change research.http://hal.cirad.fr/hal-00801931/(accessed Jan 17, 2015).Date: 2012
- 32.
Long-term climate change: projections, commitments and irreversibility.in: Climate change 2013: the physical science basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK, and New York, NY, USA2013
- 33.
The representative concentration pathways: an overview.Clim Change. 2011; 109: 5-31
- 34.
The HadGEM2-ES implementation of CMIP5 centennial simulations.Geosci Model Dev. 2011; 4: 543-570
- 35.
Climate change projections using the IPSL-CM5 Earth System Model: from CMIP3 to CMIP5.Clim Dyn. 2013; 40: 2123-2165
- 36.
MIROC-ESM 2010: model description and basic results of CMIP5-20c3m experiments.Geosci Model Dev. 2011; 4: 845-872
- 37.
The DSSAT cropping system model.Eur J Agron. 2003; 18: 235-265
- 38.
Modelling the role of agriculture for the 20th century global terrestrial carbon balance.Glob Change Biol. 2007; 13: 679-706
- 39. Global food losses and food waste: extent, causes and prevention. FAO, Rome2011 (accessed Oct 31, 2014).
- 40. Elements of information theory. 2nd edn. John Wiley & Sons, Hoboken, NJ2006
- 41.
Comparative quantification of health risks: conceptual framework and methodological issues.Popul Health Metr. 2003; 1: 1
- 42.
Modelling the impact of a healthy diet on cardiovascular disease and cancer mortality.J Epidemiol Community Health. 2012; 66: 420-426
- 43.
Estimates of global and regional potential health gains from reducing multiple major risk factors.Lancet. 2003; 362: 271-280
- 44. Quantitative risk assessment of the effects of climate change on selected causes of death, 2030s and 2050s. World Health Organization, Geneva2014
- 45.
The progressive increase of food waste in America and its environmental impact.PLoS One. 2009; 4: e7940
- 46.
Food waste within food supply chains: quantification and potential for change to 2050.Philos Trans R Soc B Biol Sci. 2010; 365: 3065-3081
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Publication history
Published: March 02, 2016
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- Food, hunger, health, and climate change
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According to the Intergovernmental Panel on Climate Change, the effects of climate change on food security could be some of the most serious in the near-to-medium term, especially if global mean temperature increases by 3–4°C or more.1,2 In The Lancet, Marco Springmann and colleagues3 dig deeper, and report the most advanced projections so far of the effects of climate change on food and health for 155 regions in the year 2050. The researchers drew on a rich mixture of emission trajectories, socioeconomic pathways, and possible climate responses to model effects on global production, trade, and consumption.
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