They determined total food grown and imported, minus what was exported, thrown away or used for livestock.

这些数据来源于粮食的总产量加上进口的数量，当然还要减去出口、浪费以及畜牧业所消耗的粮食数量。

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Another often overlooked group of farmers is the more than 200 million Africans who rely on livestock for their livelihoods, or 20% of the total population and 70% of the rural poor.

另一群常被忽视的农民群体是两亿多依赖养牲口谋生的非洲人，他们占据人口的百分之二十，农村贫困人口的百分之七十。

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Fully 18% of the world's greenhouse-gas emissions stem from the livestock industry, surpassing total emissions from the entire global transportation sector.

在全球的温室气体排放量中，足有18%来自畜牧业——超过世界上所有交通运输系统的排放量总和。

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