Warming climate are threatening the existence of polar bears... There are now about 600 polar bears in the western Hudson Bay, one of the most threatened of the 20 populations of the white beasts... That's about half the number of 40 years ago...

Hudson Bay Polar Bears May Not Survive Climate Change

Along the frosty coast of Hudson Bay, hundreds of polar bears have been wandering for weeks, waiting for the wintertime sea ice to form so they can return to hunting ringed seals. Until then, they represent a danger to the 900 people living in nearby Churchill - a remote, sub-Arctic town in Canada famous for the visiting carnivores. The town is working on a plan to prevent conflicts between hungry bears and humans, using a new radar system that can watch and warn when a bear approaches and do so in a snowstorm and during the dead of night.

Bear-spotting radar tracks polar bears migrating to the Arctic sea ice

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Hudson Bay Polar Bears May Not Survive Climate Change

Bear-spotting radar tracks polar bears migrating to the Arctic sea ice