推广等高固氮植物篱技术。

Promotes the contour nitrogen fixation plant technology.

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人类活动，如燃料燃烧、氮肥生产、固氮植物的培育和畜牧业的集约经营等是引起全球活性氮增加的主要原因。

Human activities such as fossil fuel combustion, nitrogen fertilizer production and cultivation of nitrogen fixing crops are the main sources of reactive n.

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等这块泥土逐渐成为一块狭窄的小土地以后，就可以用来种植耐旱的沙漠植物——如金合欢树，它能在土壤中固氮。

Into them farmers plant tough desert trees — like the faidherbia albida, a type of acacia — that fix nitrogen into the soil.

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