Published by Oxford University Press on behalf of the International Epidemiological Association © The Author 2009; all rights reserved.
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Ideology with evidence: global warming, maps and ethics
E-mail: shah.ebrahim@lshtm.ac.uk
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The world is getting fatter and apart from the usual reasons for being worried about this—vast increases in diabetes and cardiovascular diseases—Edwards and Roberts have given us a new one.1 They have calculated the energy costs of food production and transportation arising in two hypothetical populations, in which one has a 3.5% prevalence of obesity (reflecting UK in 1970) and the other of 40% (UK in 2010). The authors claim an increase in greenhouse gas emissions of between 0.4 and 1.0 Giga tonnes of carbon dioxide equivalents that was readily translated for environmentally naïve readers by