中东部地区持续雾霾天气让很多人都开始关注空气污染这个话题。但是光是关心可没有用，若想要解决问题，我们先要知道空气污染的源头是什么。下面小编就来细数造成空气污染的5大污染源：

　　1. Power Generation

　　发电污染

　　Siting fossil fuel power stations in mainly rural areas and distributing the pollution produced more evenly via tall chimneys has resulted in improved urban air quality, though they still remain a major source of pollution, mainly sulphurdioxide and nitrogenoxides.

　　将化石燃料发电站建在郊区，造高烟囱让污染物更平均地分布在各处，这些当然能让城市的空气变得更好。不过，发电依旧是一个很大的污染源，主要的污染物是二氧化硫和一氧化氮。

　　Better dispersion of pollutants emitted by tall chimneys leads to better dilutionin the air and thus lower local concentrations of pollutants. This has however led to pollution being dispersed more widely and to transboundaryair pollution.

　　高的烟囱能够让污染物在空气中散布得更均匀，可以更好地稀释污染物，让污染物的浓度降低。然而，这却致使污染物分布得更广泛，并且会使空气污染向其他区域传播。