It's not just the polar bears that are threatened by Global Warming. Discovery Channel has four short video segments from a series they did on Global Warming that sums up the major points of Tim Flannery's book, "Weather Makers." The facts are there. We are hurting the climate world wide. If we continue on our current course and wait until 2050 to change, it will be too late for much of the biosphere and there will be mass extinction Earth. I hope you will take a 10 minutes and watch this beautiful but alarming footage!