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Dietary greenhouse gas emissions of meat-eaters, fish-eaters, vegetarians and vegans in the UK

Climatic Change, 11/06/2014


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Resource information:
Resource IDscarborough2014
Resource titleDietary greenhouse gas emissions of meat-eaters, fish-eaters, vegetarians and vegans in the UK
Author(s)Peter Scarborough, Paul N. Appleby, Anja Mizdrak, Adam D. M. Briggs, Ruth C. Travis, Kathryn E. Bradbury, Timothy J. Key
Publication/ sourceClimatic Change
Date published11/06/2014
Summary text/ abstractThe production of animal-based foods is associated with higher greenhouse gas (GHG) emissions than plant-based foods. The objective of this study was to estimate the difference in dietary GHG emissions between self-selected meat-eaters, fish-eaters, vegetarians and vegans in the UK. Subjects were participants in the EPIC-Oxford cohort study. The diets of 2,041 vegans, 15,751 vegetarians, 8,123 fish-eaters and 29,589 meat-eaters aged 20-79 were assessed using a validated food frequency questionnaire. Comparable GHG emissions parameters were developed for the underlying food codes using a dataset of GHG emissions for 94 food commodities in the UK, with a weighting for the global warming potential of each component gas. The average GHG emissions associated with a standard 2,000 kcal diet were estimated for all subjects. ANOVA was used to estimate average dietary GHG emissions by diet group adjusted for sex and age. The age-and-sex-adjusted mean (95% confidence interval) GHG emissions in kilograms of carbon dioxide equivalents per day (kgCO₂ e/day) were 7.19 (7.16, 7.22) for high meat-eaters (>=100 g/d), 5.63 (5.61, 5.65) for medium meat-eaters (50-99 g/d), 4.67 (4.65, 4.70) for low meat-eaters (<50 g/d), 3.91 (3.88, 3.94) for fish-eaters, 3.81 (3.79, 3.83) for vegetarians and 2.89 (2.83, 2.94) for vegans. In conclusion, dietary GHG emissions in self-selected meat-eaters are approximately twice as high as those in vegans. It is likely that reductions in meat consumption would lead to reductions in dietary GHG emissions.
Library categoriesAnarchism & Action, Climate Change, Food & Agriculture, Simplicity, Vegans/Vegetarians
Added to Free Range Library30/06/2014
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file iconDietary greenhouse gas emissions of meat-eaters, fish-eaters, vegetarians and vegans in the UK [243.1 kilobytes]
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