Highway To Extinction

The United States may list polar bears as a threatened species because of a loss of habitat.

Associated Press April 1, 2007 08:56 AM

A key element of the second major report on climate change being released Friday in Belgium is a chart that maps out the effects of global warming, most of them bad, with every degree of temperature rise.

There's one bright spot: A minimal heat rise means more food production in northern regions of the world.

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