There is another way to approach this issue. Here it is:
John Kostyack, executive director for wildlife conservation and global warming at the National Wildlife Federation, criticized the decision to retain the rule, but admitted that ‘there was no way that the Fish and Wildlife Service, the Interior Department agency responsible for carrying out the Endangered Species Act, could handle the burden of trying to police emissions. In addition to conventional threats, a vital focus for wildlife managers should be figuring out how to help vulnerable species adapt to climate stresses, he said. “The last thing we want to do,” he said, “is saddle them with solving the causes of global warming, too.”’ Link: http://www.nytimes.com/2009/05/09/science/earth/09bear.html
This is a more direct way of saving the polar ecosystem: “US Wants Mandatory Cuts In Greenhouse Gases Across The Globe In Major Environmental Policy Shift" Link: http://www.huffingtonpost.com/2009/04/29/us-wants-mandatory-cuts-i_n_193112.html
Forcing the slowdown/shutdown of factories throughout America by listing the polar bear as endangered would would throw tens of millions of Americans out of work simultaneously, destabilize our economy overnight and throw the world into deep depression. And it’s not clear it would even work, because unless we convince other nations to make mandatory cuts in greenhouse gases, the polar ice will keep melting.