The main pollution sources are coal combustion, traffic emission, the residue of oil or mineral combustion and burning emission which accounts for 44.0%, 31.0% 19.9% and 4.7% of SVOCs, respectively.
整个南京地区的大气颗粒物中半挥发性有机物的主要污染源为燃煤源、交通排放源、燃油及矿物燃料残留物排放源、焚烧源，其贡献率分别为：44.0％、31.0％、19.9％、4.7％。
Commuters can choose to take buses, subways or share cars with others, which not only relieves traffic jams but also reduces gas emission.
通勤族可以选择乘坐公共汽车、地铁或是与他人合用车辆，这不仅可以减轻交通堵塞，也可以减少尾气排放。
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