想像一下你可以挥舞魔杖来提高世界农作物的产量，降低成本，使用更少的矿物燃料来种植庄稼并且减少由此带来的污染。
Imagine you could wave a magic wand and boost the yield of the world's crops, cut their cost, use fewer-fossil fuels to grow them and reduce the pollution that results from farming.
报告认为，空气品质，矿物、电力设施以及石油勘探造成的污染是印度，墨西哥和非洲人口减少的主要原因。
Air quality and pollution from mines, power plants and oil exploration have been responsible for population losses in India, Mexico and Africa, it says.
然而，一些矿物燃料比煤的污染要小。
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