来自《耶鲁大学开放课程：有关食物的心理学、生物学和政治学 第10集》

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  not the other plant part of the picture but just the animals,
  占全球排放物的百分比
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  and they calculated of the carbon dioxide emissions in the world,
  他们计算的百分比为
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  9% come just from animal agriculture.
  9% 仅畜牧业
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  The methane emissions, it's 37%
  甲烷排放物占37%
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  and the nitrous oxide emissions it's this.
  一氧化二氮排放物占这么多
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  Remember the relative capacity of methane and nitrous oxide
  想想甲烷和一氧化二氮相对二氧化碳
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  to contribute to the global warming picture over carbon dioxide.
  对促进全球变暖的相对能力
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  These numbers are very high and
  这些数据很庞大
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  of great concern to the food environment.
  与食品环境联系密切
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  The question is what can be done about it.
  我们能为此做些什么才是问题所在
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  So the fact that environmental activists are saying
  大家可以明白一个事实
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  eat less beef, you can see why.
  为什么环保分子提倡少吃牛肉