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USAFacts

Environment

Air quality in the US since the passage of the Clean Air Act

United States EPA Pollution

April 22, 2021 marks the 51st anniversary of Earth Day, an event that began in 1970 when 20 million Americans demonstrated across the country to call for greater protection of the nation’s environment. Initiated by Senator Gaylord Nelson of Wisconsin, the event was an expression of the public’s growing concern about issues like air and water pollution. The same year also marked the creation of the Environmental Protection Agency (EPA) and President Richard Nixon signing the Clean Air Act.

What is the Clean Air Act?

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