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1·There was also passage of the Clean Water Act and the Clean Air Act was strengthened.

《清洁水法》也通过了，并且《清洁空气法》也得到了支持。

2·In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly.

在《清洁空气法案》强制要求美国使用无铅气体的二十年里，铅在世界范围内的累积量显著下降。

3·Forty years after the Clean Air Act, more people are breathing easier.

空气清洁法实行后40年来，越来越多人呼吸到更加清新的空气。

4·Still need clean water act, clean air act, more trees and better urban design.

仍然需要干净的水，新鲜的空气，多种树，更好的城市设计。

5·This shows that the Clean Air Act can be used to reduce these gases in a cost-effective way.

这表明，清洁空气法案将是一项节省成本的减排法案。

6·The United States in 1963 had laid down the Clean Air Act and in 1970 and 1990 amended it.

美国1963年就制订了《清洁空气法》，并于1970年和1990年分别进行了修订。

7·This resulted in passage of the Clean Air Act of 1970 and subsequent amendments in 1977 and 1990.

这导致了1970年“清洁空气法案”的通过及其1977年和1990年的修订。

8·The Clean Air Act mandates the EPA to regulate harmful pollutants such as particulate matter and ozone.

《清洁空气法》授权美国环保局监管有害污染物，如微粒物质和臭氧。

9·The agency says the cars released pollutants up to 40 times above the limits allowed under the federal Clean Air Act.

该机构表示，这些汽车排放的污染物高达联邦清洁空气法案允许限度的40倍。

10·These provisions provide less guidance than most of the analogous provisions of the Clean Air Act or Clean Water Act.

这些条款与《洁净空气法案》和《洁净水法案》的大部分类似条款相比，提供的指导更少一些。