相反，汽车排放的废气对环境有害。

In contrast, the exhaust released by the car is harmful to the environment.

youdao

汽车排放的废气对环境有害。

Gas emissions from cars are harmful to the environment.

youdao

这种烟雾含有汽车排放的废气和被阳光照射后发生变化的氧化氮。

It contains automobile exhaust fumes and nitrogen Oxides changed by the sun's rays.

youdao

Clearly, if I did nothing more, but I took every car, doubled its fuel economy, its emissions would go to 50% of what they are now, no other changes being made.

显然，如果我什么也不做，但是我把没量车的汽油价加倍，汽车废气排放量就会是现在的一半了，别的不会有什么改变。

麻省理工公开课 - 固态化学导论课程节选