WESTCHESTER COUNTY, N.Y. -- Today marks the 45th anniversary of Earth Day .
The first Earth Day on April 22, 1970, activated 20 million Americans from all walks of life and is widely credited with launching the modern environmental movement.
Today more than one billion people participate in Earth Day activities making it the largest civic observance in the world.
For more information, visit www.earthday.org/ . Feel free, too, to tell us how you're celebrating.
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