The publicity about the danger to polar bears from global warming could easily lead you to believe that their numbers are already shrinking dangerously. In fact, in the early 1970s, the number of polar bears was estimated at between 5,000 and 10,000. As a result of hunting restrictions, there are now between 20,000 and 25,000 polar bears.
It is true, however, that if global warming continues to reduce the ice-covered area of arctic, which is the polar bears habitat, then the bears are in danger. One of the southernmost populations, in Western Hudson Bay, has declined by over 22% in the past 20 years as warmer temperatures have reduced the length of their winter hunting season in that area.