PS. Lambert made the unfortunate mistake of trying to defend the polar bear stuff.
Comment one to Lambert’s defense linked to this:
http://ker-plunk.blogspot.com/2007/10/inconvenient-truth-ruled-inconveniently.html
Polar Bear -- Conservation Issues
"The primary threat to polar bears is the decrease of sea ice coverage. Although some females use snow dens on land for birthing cubs, polar bears are almost completely dependent upon sea ice for their sustenance. Any significant changes in the abundance, distribution, or existence of sea ice will have effects on the number and behavior of these animals and their prey."