EcoWatch: Al Gore has been one of the leading voices in support of the environmental movement for decades, advocating for protection of the planet while in Congress and serving as former President Bill Clintons vice president. Hes written four books on the subject. His role became especially high profile after the release of the 2006 documentary An Inconvenient Truth, which spotlighted the work he had been doing to raise awareness of climate change through a slide show presentation hed been doing to groups...