A Bush-era regulation that limits protection of polar bears from global warming remains unchallenged by the White House. Though Congress gave Interior Secretary Ken Salazar the authority to change the rule, he's expected to announce on Friday that it stands. The law says no action outside the Arctic can be considered a threat to the animal, even though it is endangered due to the melting of Arctic sea ice, widely believed to be caused by global warming. Environmentalists hoped they could use the Endangered Species Act to require country-wide stricter emissions controls.
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