The Clean Air Act of 1970 established federal emissions standards and timelines for achieving cleaner air.
The Clean Air Act of 1970 was significant as it established federal emissions standards to regulate pollutants from stationary and mobile sources. It also set a timetable for achieving cleaner air by imposing deadlines on industries to meet new pollution standards and requiring automakers to reduce vehicle emissions. The law resulted in a dramatic reduction in smog in American cities.
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