Independent: An international action plan is to be drawn up to save the polar bear, now threatened with extinction because climate change is melting its Arctic sea ice habitat. The five countries with polar bear populations, the United States, Canada, Russia, Norway and Greenland, agreed in principle on a circumpolar scheme to protect the animal’s dwindling living space. The plan, to be drawn up by a team of polar bear experts, is likely to call for protected areas for denning in winter and …