Unfinished business: Earth Day 40 years later

This year marks the 40th anniversary of Earth Day, with events around the globe including a rally in Washington, D.C. The first Earth Day was organized by a small group of activists in Dupont Circle.

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VIDEO: Megan Rossman - The Washington Post | SOURCES: Historic video courtesy of Milwaukee Public Television and the Environmental Protection Agency, historic photos courtesy of Environmental Protection Agency, AP and Getty
The Post examines where U.S. environmentalism has succeeded, where it has failed, and how the ideas of that movement shape government policy today.

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