Claudia Feldman of the Houston Chronicle conducted this interview with Al Gore: HOUSTON — At the end of the presidential campaign six years ago, Al Gore was political dead meat. Even supporters winced at his stiff campaign style, and a New York Times columnist who asked if he was a dud or a dude pronounced him a dud. That Gore is nowhere to be seen in "An Inconvenient Truth," which opened Friday. Instead, the star of the show is warm, funny, comfortable in his middle-aged body. He's taken on a battle of almost mythical scope — to save the planet...