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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And then with regard to the EPA, which is often under siege but is responsible for ensuring that the air we breathe, that our children breathe when they run out on the soccer field is clean and that the water they drink is clean and not harmful, do really important work.

WHITEHOUSE: Press Briefing