a hint i think may be gather by the various comment on this thread . i be quite amaze at the number of people who like this film who want to make it mandatory or compulsory . i think this give u a little bit of insight into the reason this film and the issue underlie it be so polarizing . the global warming issue appeal a lot to people who want to force others to do right . it appeal particularly to more liberal leaning people because it doesn not have to do with bedroom morality which be what usually get conservative who want to force you to be good go . and that the problem with the film . al gore be a politician . and a very successful one at that . he just can not help himself from appeal to those people who want to force others to do a they would . the political appeal be just too great . and there we be leave with a scientific issue that may be of huge importance and reduce to a political issue appeal to those in the body politic with a predilection to force other to do right . another interesting question be how do the environmental movement get hijack by such people .