Building more bypasses will help the environment by reducing pollution and traffic jams in towns and cities.

修建更多的支路将减少城镇中的污染和交通堵塞，从而改善环境。

《柯林斯英汉双解大词典》

youdao

youdao

More than three billion people are at risk from indoor air pollution because of the heating or cooking fuels they use.

VOA: special.2010.02.01

It's a bit more ethical because you don't have to worry about all the pollution

这样做很符合社会公德，因为你不用担心会产生污染，

地铁的好处 - SpeakingMax英语口语达人

But again, the more people cycle, the less pollution we have.

但是再次地，人们骑自行车越多，污染就会越少。

我使用自行车 - SpeakingMax英语口语达人

The industry that deals with it is becoming more efficient, the technologies are getting more effective and the pollution it causes is being controlled more tightly.

ECONOMIST: Talking rubbish

Andy Atkins, executive director of Friends of the Earth, said the road would cause more pollution, damage the environment and do little to boost the economy.

BBC: Tree protester

If fossil fuels are used, the process then consumes more energy than is produced, and the result is likely more pollution.

FORBES: Hydrogen-Powered Vehicles Could Emerge From Traffic