Save the Polar Bears!

I've always heard of the polar bears dying because of global warming. It was chanted by the eco-freaks almost as often as Save the Whales! But now being an eco-freak myself and seeing a video recently on Planet Earth I am horrified. The bears that would normally just walk in search of food are falling through the melting ice and crawling to inch their way about. They look utterly miserable and it is one of the saddest sights I've ever seen. What are we doing to our planet?

Here's a good video.