something very strange happens when you talk about global warming represent science go out the window and belief and consensus become the topic of discussion . it because of that fact that i give a fail mark to al gore documentary . instead of promote intelligent discussion and he keep the debate at the level of belief and consensus . of course and when youre try to sell the world into spend trillion of dollar to stop global warm you may thing it a problem to tell the scientific truth represent we do not know how much of the current warming be cause by human . maybe none of it and maybe some of it and or maybe it have over cede the next ice age and we get really lucky not to have boil the planet . but the fact remain that we do not know . so be ask to believe in the consensus . never mind that any scientist that stray from the consensus be ostracize . never mind that scientific inquiry be about stray from the consensus . einstein do not believe in the consensus and neither do copernicus or galileo . so why so much scorn place on those very researcher who would advance the field by ask the tough question . if global warming be so incontrovertible and surely a few people test that theory can not be so threatening . what be go on here . that the movie i be hop al gore would have make . istead and he choose to shore up his support with the true believer of the consensus . sad and really .