Director Davis Guggenheim eloquently weaves the science of global warming with Al Gore's personal history and lifelong commitment to reversing the effects of global climate change in the most talked-about documentary at Sundance. An audience and critical favorite, An Inconvenient Truth makes the compelling case that global warming is real, man-made, and its effects will be cataclysmic if we don't act now. Gore presents a wide array of facts and information in a thoughtful and compelling way: often humorous, frequently emotional, always fascinating. A must-see film regardless of one's political views, or opinion of the messenger.