Earth Day - The History of Earth Day

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Published 25 Apr 2010
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Earth Day  On Earth Day, 2008, NBC News anchor Tom Brokaw recounts the history of Earth Day -- its proposal...
Earth Day  On Earth Day, 2008, NBC News anchor Tom Brokaw recounts the history of Earth Day -- its proposal by Wisconsin Senator Gaylord Nelson in 1970, the legislation enacted and progress made since.
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