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COMING CLEAN

Fifty years ago, no one questioned whether it made sense to drill for oil or dig for coal.
Egrets gather on a floodplain in Danube-Dráva National Park, Hungary.
Sorry, beavers. Hydrologists trying to improve conditions for fish just don't need you anymore.
To fish or to mine? Alaskans must decide the future of a wild beach with a long history.
Lumber Liquidators was turning virgin trees from the world's last Siberian tiger habitat into floorboards.
Can you help Clueless U clean up its act? Play to find out.
A Columbia student helps Nepali villagers deal with climate change.
A wig made of sea sponge protects this crustacean from predators.
Wisconsin and Florida officials adopt the bureaucratic equivalent of sticking their fingers in their ears and saying "la la la."