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POPSAssumptions in Polar Bear Populations What we do know about polar bears is that, contrary to media portrayals, they are not fragile "canary in the coal mine" animals, but are robust creatures that have survived past periods of extensive deglaciation. Polar bear fossils have been dated to over one hundred thousand years, which means that polar bears have already survived an interglacial period when temperatures were considerably warmer than they are at present and when, quite probably, levels of summertime Arctic sea ice were correspondingly low.
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POPSPolar Bear Populations Given these uncertainties, the best estimate--guesstimate might be a better term--published by the International Union for Conservation of Nature (IUCN) Species Survival Commission's (SSC) Polar Bear Specialist Group, is that there are about twenty thousand to twenty-five thousand polar bears worldwide.
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POPSBackdoor Kyoto Protection under the Endangered Species Act will provide concrete help to polar bears and could revolutionize American climate policy. Since U.S. resistance to curbing greenhouse gases has allowed other countries to shirk their responsibilities as well, major changes in American policy are likely to have a powerful domino effect, catalyzing change in climate policy worldwide. From polluting power plants in the Midwest to auto manufacturers, a vast array of industries may have to clean up their acts to give the polar bear a chance to survive.
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