One of these comes from making fertilisers, using the Haber-Bosch process which converts nitrogen gas into ammonia.

其中一种是通过将氮气转换成氨气的Haber - Bosch工序来制造肥料。

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Haber-Bosch process(Haber ammonia process, synthetic ammonia process):First economically feasible method of directly synthesizing ammonia from hydrogen gas and atmospheric nitrogen.

哈伯-博施法（亦称哈伯制氨法或合成氨法）：用氢和空气中氮直接合成氨的方法。

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Water was also plentiful it takes 1, 000 tonnes of water to produce a tonne of grain and an ingenious process known as Haber-Bosch makes synthetic nitrogen fertiliser easily available to grain farmers.

ECONOMIST: Food in rich countries