联合国粮农组织2006年底报告指出,畜牧业是造成全球暖化的最大元凶。每生产1公斤肉类,就要排放36.4公斤的二氧化碳,牲畜打嗝和放屁所排放的温室气体占世界总排放量的51%,比全世界的火车、汽车、飞机和工业污染排放的温室气体加起来还要多。甲烷的温室效应是二氧化碳的23倍,而甲烷排放的37%来自牲畜。 The FAO report at the end of 2006 pointed out that livestock husbandry is the single biggest contributor to global warming. Every kilogram of meat produced emits 36.4 kilograms of carbon dioxide. Livestock hiccups and farts emit about 51 percent of the world’s greenhouse gas emissions, more than the global greenhouse gas emissions of trains, cars, airplanes and industrial pollution More up. Methane has 23 times the greenhouse effect of carbon dioxide and 37% of methane emissions from livestock.