And reducing building pollution is one important way for lowering outdoor airflow requirement, the higher indoor population density is, the greater energy conservation is.

同时，降低我国建筑污染水平是减少新风需求的重要途径，并且人员密度越高节能空间幅度越大。

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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》

They keep our air clean, reduce noise pollution, improve water quality and provide food and building materials.

他们保持我们的空气清洁，减少噪音污染，改善水质，提供食品和建筑材料。

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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'