In a file photo former Vice President Al Gore makes talks to the media as he walks into a screening of the documentary 'An Inconvenient Truth' in Boston Tuesday, April 25, 2006. The nation's top climate scientists give the movie based on Al Gore's book, 'An Inconvenient Truth,' five stars for accuracy. He mostly got the science right, say 19 climate experts who had seen the moive or read the book. (AP Photo/Elise Amendola)