The gas is produced as a byproduct of fertiliser use in agriculture and other industrial processes.
该气体是农业施肥及其他工业活动的副产品。
For example higher fertiliser use raises water productivity but adds pollution to the environment.
例如,增加化肥使用量会提高水分生产力,但会对环境造成污染。
This is largely because of reductions in fertiliser use and the amount of nitrogen leaching from manure.
这是相当大的一部分,因为可以减少施肥和从动物粪便中滤出的氮。
China could cut fertiliser use by at least a third without ill effects.
因此,中国至少可以减少三分之一化肥的用量,而不会造成任何影响。
Returns on fertiliser use are diminishing.
施用化肥的收益也正在减少。
Given Beijing's absolute resolve to be self sufficient, huge increases in fertiliser use are the only way to bridge the gap between demand and supply.
鑒于北京坚持完全自给自足的解决方式,大量增加化肥的使用是解决供求关系差额的唯一的方法。