Honor Earth Day

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By Lisa Hoehn/April 18, 2012 11:48 am EST

Earth Day is April 22. Celebrate the planet by rallying on the National Mall in Washington, D.C., running in the Earth Day Marathon (or Half Marathon) in Gambier, OH, trekking for 4 hours through the wild Everglades, and more. Find local eco-events at earthday.org/2012.