Livestock accounts for 15% of greenhouse-gas emissions

A 2013 United Nations Food and Agriculture Organization study estimated that livestock accounted for 15 percent of greenhouse-gas emissions, about the same as the entire global transport sector.

Other analyses, which argue that the UN estimate doesn’t adequately account for things like the CO2 produced by the respiration of tens of billions of farm animals, estimate that livestock might be responsible for up to 51 percent of global emissions. “Meat is heat,” environmentalists like to say.

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Carbon Fast Facts