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Polar Bears Listed as Threatened
 
Polar bears have been added to the list of threatened species . n his statement, US Secretary of the Interior Dirk Kempthorne noted   is the greatest threat to the bears.
 
Polar bears live in the Arctic and hunt seals and other fatty marine mammals from sea ice. They also travel, mate, and sometimes give birth on the ice. But sea ice is melting as the planet warms,   for several more decades. Because polar bears are vulnerable to this loss of habitat, they are likely to become endangered in the foreseeable future, Kempthorne said.
 
Although many scientists say for the melting sea ice, the new polar bear protections will not change U.S. climate policy.
 
Scott Bergen, a landscape ecologist, noted will depend on international cooperation. Permanent sea-ice habitat is likely to remain in areas outside of the U.S., particularly in Canada and Greenland.
 
Scientists view these areas as refuges over the long term and repopulate the Arctic if temperatures decrease and sea ice returns.
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