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》

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“Despite 40 years of building ever-cleaner vehicles, we still have a vehicle pollution problem in this country, ” Mr. Kassel said.

“尽管40年来，我们一直在开发更清洁的车辆，国内的汽车污染问题仍然很严重，”卡塞尔先生承认。

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When we put in place new common-sense rules to reduce air pollution, we create new jobs building and installing all sorts of pollution-control technology.

WHITEHOUSE: President Obama Speaks to Environmental Protection Agency Staff | The White House

Part of the reason for this decline is that many toads become homeless each year as wild ponds are lost due to road building, development, pollution, intensive farming and drought.

BBC: NEWS | UK | England | Cumbria | Rush hour threat to amorous toads

David Docherty, head of estates at the Royal London Hospital, part of Barts Health NHS Trust, told the BBC there were other considerations when it was decided to move the hospital from its old Whitechapel premises to a new adjacent building - namely, air pollution.

BBC: Closing hospital windows 'increases infection risk'