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。

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。

They're everywhere. These chemical pollutants are currently not a criteria air pollutant, as defined by the U.S. Clean Air Act.

它们无处不在，这些化学污染物据美国清洁空气法案定义，目前还不在空气污染物的标准中。

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。

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。

As a result, the Clean Air Act of 1956 banned burning coal in certain areas of the city, leading to a massive reduction in smog.

于是，1956年颁布的清洁空气法案开始禁止在城市中的某些区域燃烧煤炭，从此雾霾的影响显著消退。

But two years ago those exceptions were eliminated when the Supreme Court ruled that the EPA could indeed regulate CO2 as a pollutant under the Clean Air Act.

但是，两年前，最高法院裁定，美国环保局确实可以按照《清洁空气法》把二氧化碳作为污染物监管，从而废除了这些例外。

That's one rationale for handing this issue over to Congress: The Clean Air Act, as written, simply isn't well-designed to handle a massive issue like climate change.

这成为了将这一问题交给国会处理的一个依据：《清洁空气法案》，就目前版本而言，并非针对解决气候变化这种大问题而制定的。

The federal government promulgated the Clean Water Act and the Clean Air Act.

联邦政府颁布了《水清洁法》和《空气清洁法》.

Imagine a time before The Clean Air Act, The Clean Water Act, The Endangered Species Act, and even the Environmental Agency.

想象清洁大气法、清洁水资源法、濒危物种保护法，甚至环境机构法颁布之前的那段时期。