What happened in the 1970s?
🌿 Environmental Conservation: The U.S. passes the Clean Air Act (1970)
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Further Reading
Summary of the Clean Air Act | US EPA (epa.gov)
United States: Clean Air Act (1970) - AQLI (uchicago.edu)
The Clean Air Act 101 - NRDC (nrdc.org)
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Clean Air Act (United States) - Wikipedia (wikipedia.org)
Clean Air Act - Air (U.S. National Park Service) (nps.gov)
Clean Air Act: A Summary of the Act and Its Major Requirements (congress.gov)
The United States Clean Air Act turns 50: is the air any better half a ... (unep.org)
CHEVRON, U.S.A., INC., Petitioner, v. NATURAL RESOURCES ... (cornell.edu)