The Clean Air Act was passed by congress in 1970. Major amendments were added in 1977 and again in 1990. While minor adjustments have been made sporadically, the core of the initial law still stands today. The act ensures that citizens of the United States have clean air to breathe. The CAA outlines the responsibility of the Environmental Protection Agency (EPA) on how to protect and improve air quality. It also has regulations dealing with the stratospheric ozone layer.
As referenced by cleanairtrust.org the act has been quite successful since its passing. Emission levels of toxic lead, sulfur dioxide and carbon dioxide have all dropped dramatically despite the increase of industry and automobiles.
The law is essential in the protection of our environment from the damages of pollution.
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