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Africa will remain a major phosphate exporter and increase nitrogen exports while importing all of its potash.

非洲仍将是磷肥的主要出口国，其氮肥的出口量将增加，但是其钾肥将全部进口。

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Asia is expected to produce a rapidly increasing surplus of nitrogen, but will continue to import phosphate and potash.

亚洲氮肥生产过剩的情况预计将迅速增加，但将继续进口磷肥和钾肥。

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Potash is the biggest producer of potash and nitrogen and third-biggest maker of phosphate.

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It points out, though, that there is little evidence things like the behaviour of the nitrogen cycle or the phosphate cycle in the Holocene were particularly well-suited to humans.

ECONOMIST: The global environment