Ammonia gas released by fertilized cropland is a cause of air pollution,the . The land can also released release nitrous outsidebyheattricin oxide, a heat-trapping gas.

• 施肥后的农田释放的氨气是空气污染的一个因素。这些土壤能够释放氮、氧化物，一种可以燃烧的气体。