History of Earth Day By hunsickm Apr 22, 1970 First Earth Day Senator Nelson's idea becomes a reality with 20 million people participating in the first Earth Day Dec 1, 1970 Natural Resources Defense Council (NRCD) Established Dec 2, 1970 Environmental Protection Agency Established Sep 15, 1971 Greenpeace founded Oct 18, 1972 Congress passes the Clean Water Act Dec 28, 1973 Congress Passes the Endangered Species Act Apr 22, 1990 20th Anniversary of Earth Day Apr 22, 2000 30th Anniversary of Earth Day Apr 22, 2010 Wood Middle School Commemorates the 40th Anniversary of Earth Day by planting 40 trees