IJE Advance Access originally published online on April 19, 2009
International Journal of Epidemiology 2009 38(4):1137-1140; doi:10.1093/ije/dyp172
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Population adiposity and climate change
Department of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK.
* Corresponding author. Room 186, NPHIRU, Department of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, Keppel Street, London WC1E 7HT, UK. E-mail: phil.edwards{at}lshtm.ac.uk
| Abstract |
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Background The increasing global prevalence of overweight and obesity has serious implications for the environment, as well as for health. We estimate the impact on greenhouse gas emissions of increases in the population distribution of body mass index (BMI).
Methods We estimated the food energy required to maintain basal metabolic rate in two hypothetical adult populations using the Schofield equations for males and females. Additional greenhouse gas emissions due to higher fuel energy use for transporting a heavier population were estimated.
Results Compared with a normal population distribution of BMI, a population with 40% obese requires 19% more food energy for its total energy expenditure. Greenhouse gas emissions from food production and car travel due to increases in adiposity in a population of 1 billion are estimated to be between 0.4 Giga tonnes (GT) and 1.0 GT of carbon dioxide equivalents per year.
Conclusions The maintenance of a healthy BMI has important environmental benefits in terms of lower greenhouse gas emissions.
Keywords Climate, greenhouse effect, body mass index, obesity, overweight, food, transportation
Accepted 3 March 2009
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