GREEN
06/19/2010 05:12 am ET Updated May 25, 2011

The Green Movement: The Day It All Started 40 Years Ago

BOISE, Idaho -- One U.S. senator and a core of young organizers turned April 22, 1970 , into the day the environmental movement was born.

On that day, 20 million Americans in 2,000 communities and 10,000 schools planted trees, cleaned up parks, buried cars in mock graves, marched, listened to speeches and protested how humans were messing up their world.

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