This video from North America says about itself:
National Wildlife Federation Naturalist David Mizejewski explores the relationship between sea ice and polar bears. As continued global warming leads to less ice in the Arctic the bears have less opportunity to hunt for food. David outlines the direct link that sea ice has to the feeding habits of polar bears and why a warming climate is a danger to the species. With the help of Polar Bears International, NWF scientists learn first hand about the threat to these awesome creatures.
See also here.
October 2011: A dramatic reduction in polar-bear habitats in the next ten to 50 years has been predicted. The study by IUCN (International Union for Conservation of Nature) warns this is due largely to global warming: here.
A US federal judge has thrown out a key section of an Interior Department ruling that said the threat to polar bears posed by global warming could not be used to limit industrial development: here.
Only about 18% of Hudson Bay (Canada) was covered by ice this summer–43% is average. Bad news for polar bears: here.
International Polar Bear Day: 13 Things You May Not Know about Polar Bears: here.
“It’s not a question of ‘if’ a major spill will occur in the Arctic, but ‘when and where'”: here.