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In reply to the discussion: Do you enjoy beef? You're directly contributing to climate change. Beef is the new SUV. [View all]muriel_volestrangler
(101,316 posts)and between the animal types (and for milk and egg production too): http://www.fao.org/docrep/018/i3437e/i3437e.pdf
Their estimates of CO2 per kg of product (carcass weight - add about 30% to get to the 'cut of meat' value) vary a lot around the world - for beef, 30kg in North America, 15kg in Eastern Europe, and over 70kg in Latin America (that includes a figure for pasture expansion - without that, it would be about 48kg).
For North America, it's about 1.8kg per kg (ie liter) of milk; 4.7kg per (carcass) kg of pork; 4.5kg per (carcass) kg of chicken; and 2.9kg per kg of eggs (including shell, presumably). Other sources reckon that it takes perhaps 9kg of milk to make 1kg of cheese, which means that cheese production emits more CO2 than pork or chicken, but not beef.