Science textbooks get scary when they're written by UberRepublicanChristian types... The biology ones are the worst, but, well, that's to be assumed. How can any person writing a chemistry textbook say that what happens to the environment doesn't matter?

To be fair though, Al Gore is a bit of a leftist propaganda man. But just because something's spread by propaganda doesn't make it automatically false. The biblical epistles were propaganda, weren't they? Commercials for things that are good that say that they are good are propaganda, aren't they? Propaganda doesn't mean lies; it means attention-grabbing media-ish things.