we keep hearing how the polar bear numbers are shrinking do to global warming

http://en.wikipedia.org/wiki/Polar_Bear

states that although the numbers are shrinking do to global warming according to the petition to make them endangered it is not global warming pollution that is causing it

also the land that they want protected for the bear is NOT here it is in their words

On December 27, 2006, the United States Department of the Interior in agreement with the three groups proposed that polar bears be added to the endangered species list, the first change of this type to be attributed to global warming. It will take up to a year to make the final determination. [29] The Natural Resources Defense Council contends that though it is "a big step forward" the proposal fails to identify global warming pollution as the cause of rising Arctic temperatures and vanishing sea ice. In addition, it says the proposal offered by Dr. Rosa Meehan, Supervisor of the U.S. Fish and Wildlife Service, does not designate any of the land discussed as the kind of habitat that is essential for the polar bear's survival as "critical habitat" that could help the bear recover. [30][31]


http://en.wikipedia.org/wiki/Global_warming

since man is the only thing causing global warming according to the dems. how do the explain this


A rapid buildup of greenhouse gases caused warming in the early Jurassic period (about 180 million years ago), with average temperatures rising by 5 °C (9.0 °F). Research by the Open University indicates that the warming caused the rate of rock weathering to increase by 400%. As such weathering locks away carbon in calcite and dolomite, CO2 levels dropped back to normal over roughly the next 150,000 years.[31][32]