Assuming you are indeed correct, and that anything within that article is incorrect, then maybe it is. But, Deedee, if we both agree that Polar Bears have, in fact, not dropped in population in the last 30 odd years, then are they truly in trouble? Can we safely say Global Warming is responsible?
Forty years ago, polar bear numbers were becoming dangerously low... due to overhunting, oil speculation/spills, human encroachment. We intervened these last decades, and it's only through the continued vigilence of scientists that we've maintained their numbers. They didn't "just" flourish. Most people don't understand that.
The future holds other survival problems for these creatures, in the form of pollutants and climate change. Global warming seems to have become a dirty word because it polarizes (

people either to the left or right, with the righties claiming it isn't manmade but is simply a natural manifestation of the world cooling and warming as it has for millions of years, and the lefties saying that it is, in fact, a manmade problem. Either way, the cause, human or otherwise, is irrelevant. The simple fact is that the world is experiencing climate change which has, and will continue to affect the habitat of arctic marine animals, polar bears, etc. So, whatever you want to call this phenomena, yes, it is responsible. The last article I posted goes into the effects of climate change on polar bears in particular.
The irksome thing about righties is that they would have us believe that we need do nothing, (as in, hey, polar bears did just fine for 40 years, failing to factor in human intervention) that all will be right with the world because global warming is a "normal and natural" phenomena, whereas at least the lefties among us are willing to take some positive steps to prevent the extinction of certain species of animals.