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12 moments of Earth Day

By: Laura Moss on April 22, 2010, 2:30 p.m.
man in solar-powered structure in Washington, D.C.

Photo: ZUMA Press

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Solar power exhibit in Washington, D.C.

A man listens to music inside a solar-powered environmental structure at the National Mall in Washington, D.C.

A massive climate rally will be held in the U.S. capital on Sunday to commemorate Earth Day.