Former Vice President Al Gore was back on Capitol Hill Wednesday, imploring lawmakers to act swiftly and decisively to avert a climate catastrophe. But does the latest scientific evidence suggest any such calamity around the corner? What does it show? Why can’t climate change alarmists afford to be wrong? And how is this movement very much involved in the current debate over an economic stimulus package. We ask Dr. Tim Ball, former professor of climatology at the University of Winnepeg.