Polar bears and climate

I found this article on dot earth which is very interesting on how climate change is effecting Polar bears and that they are projected to decrease significantly in the very near future due to loss of habitat. Here is part of the article and if you'd like to read it all you can click here:

In summary, polar bear
numbers probably increased in some areas during the 1970s and 1980s, and perhaps
even into the 1990s, because of greater protection from direct human
mortalities. They now are declining, or soon will be declining because of loss
of habitat. Polar bears, like other species of wildlife, cannot survive without
suitable habitat. To suggest that increases in polar bear numbers because of
harvest controls has some relationship to projected decreases in response to
losses of habitat only serves to distract the reader from the issue at
hand.