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Plutonium Tanks

Photo: Plutonium tank farm in Hanford, Washington
A tank farm at Hanford, Washington, built in the 1940s, uses only single-wall tanks to store radioactive sludge from plutonium processing. Many of the tanks have leaked, tainting groundwater.
Photograph by Peter Essick

Earth Topics

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Photo Contest

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Adventure Videos

Check out adventure videos from our West Coast Adventure Editor Steve Casimiro and go "Behind the Lens."

Six Degrees Book and DVD

Image: Cover of Six Degrees: Our Future on a Hotter Planet

Get an eye-opening warning of the dangers of climate change, one degree at a time.

Forces of Nature

Photo: A volcano erupting

Guide to the most powerful forces on Earth: earthquakes, volcanoes, hurricanes, and tornadoes.

Support Conservation

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Help conserve the world's natural resources.