As the economic, political and personal costs of doing nothing to mitigate climate change skyrocket, there's one lifestyle change that slashes dietary greenhouse gas emissions in half: Veganism.
A new report published in the journal Climatic Change compared greenhouse gas emissions attributable to more than 55,000 meat-eaters, fish-eaters, vegetarians and vegans in the U.K. The researchers found that meat-eaters' dietary greenhouse gas emissions were twice as high as vegans'.
The production, transportation and storage of food greatly contributes to emissions, the study points out. These emissions range from carbon dioxide related to fossil fuels used to power farm machinery, to the methane released by livestock. Animal-based products tend to release more emissions than plant-based products due to the methane animals can produce and the inefficiencies in growing livestock feed.
According to the U.S. Environmental Protection Agency, agricultural practices contribute 14 percent of global greenhouse gas emissions.
The study found that mean dietary greenhouse gas emissions (results reported for women and then men) was 46 percent and 51 percent higher than for fish-eaters, 50 percent and 54 percent higher than for vegetarians, and 99 percent and 102 percent higher than for vegans.