American Rivers

North America's native freshwater species--the fish, mussels, crayfish, frogs, snails and other animals that live in rivers and streams--are going extinct as fast as species that live in tropical rainforests.

And dams are mostly to blame. That's the message of a recent report, America's Most Endangered Rivers of 2000, released by the conservation group American Rivers. The report names rivers that face the most serious and immediate environmental threats. 

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