空气污染来自工厂、电站和汽车。
Air pollution comes from factories, power stations and cars.
工厂、发电站和汽车排放到大气中的二氧化碳，现在最终有四分之一被海洋吸收了。
About a quarter of the carbon dioxide pumped into the atmosphere by factories, power stations and cars now ends up being absorbed by the oceans.
当然，在过去，电动汽车曾面临一些问题，如有限的行驶里程和紧缺的充电站，这都限制了人们对电动汽车的使用。
Sure, in the past electric vehicles have their problems, namely, a limited driving range, and very few recharging points, which limited their use.
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