The Impact
Earth Day has helped put environmental issues on the national agenda in the U.S. The event also inspired various environmental legislation in the 1970s, including the Clean Water Act (1972) and the Toxic Substances Control Act (1976), according to Columbia University's State of the Planet news website.
And the impact of Earth Day has gone far beyond the U.S. For example, the United Nations General Assembly formally recognized April 22 as International Mother Earth Day in 2009, according to the United Nations Environment Programme.
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