Clean Air Act Amendments (1970)

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US legislation that built on the Clean Air Act (1963) and expanded the federal role in setting and enforcing ambient air quality standards, including regulating land management practices to achieve and maintain such standards. It set emissions standards for stationary sources (such as factories and power plants), motor vehicles (automobiles and trucks), criteria pollutants (including lead, ozone, carbon dioxide, sulphur dioxide, nitrogen oxides, and particulate matter), and toxic pollutants.

Subjects: Environmental Science.

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