If your goal was to change minds about global warming and save the world, you'd have served that purpose better by not wrapping your message in an infomercial about Al Gore Brand Heroism(tm). By mixing messages, you gave the people who most need to be convinced an out for dismissing the whole exercise. By finishing with the "You rabble change how you live while I jet around the globe saving you" flourish, all you did was piss me off. So - goal important enough to make movie, not important enough to keep it from being a vanity driven ego pumper.

Bad Al Gore. Bad Davis Guggenheim.