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9集 第9集》

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  increasing meat consumption around the world.
  全世界的肉类消费越来越多
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  I'll show you some figures later about
  一会我将给大家呈现一些有关
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  the amount of energy that it takes to produce meat.
  生产肉类所需能源的数据
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  The more or less the way it works is that if you
  只要你吃肉
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  --if you're eating meat it means that
  情况或多或少就是这样的
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  you're paying for or somebody is paying for the land,
  你或其他某些人为
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  the grain that gets used to feed the animal,
  饲养动物的土地和饲料来买单
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  and then you get meat from that.
  然后你才能得到肉类
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  Let's just say corn goes
  我们就来谈谈
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  into feeding the cow, or other grains too,
  用于养牛和其他牲畜的谷物吧
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  but let's just take the corn as an example.
  但就以玉米为例
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  Humans could eat the corn itself,
  人类本来可以直接吃玉米