A chemist by training, Robinson started gaining attention for his global warming views when he was asked to write an editorial for The Wall Street Journal on the subject 12 years ago, and he has since made the transition from skeptic to denier of man-made global warming. "I'm convinced now that there's overwhelming evidence the hypothesis is wrong," Robinson said of the belief that carbon dioxide released into the atmosphere is causing the planet to warm. "There's one big environmental effect - it fertilizes plants, and there's a huge increase in plants and animals due to this thing... It's a...