A Polar Bear walks on the frozen tundra next to Hudson Bay ahead of
the freeze-over 12 November 2007 outside Churchill, Mantioba, Canada.
| PAUL J. RICHARDS via Getty Images
In fact, they will say, the dangers of a warming Earth are immediate and very human.
"The polar bear is us," says Patricia Romero Lankao of the federally financed National Center for Atmospheric Research in Boulder, Colo., referring to the first species to be listed as threatened by global warming due to melting sea ice.
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