The Great Warming Swindle, was a film made as a polemic.

Polemics aren't the best method of informing people, especially when this particular one is extremely controversial and has been criticized by a large section of the scientific community as being inaccurate, using old data, misinterpreting data, misrepresenting interviewees and taking them out of context etc.

http://en.wikipedia.org/wiki/The_Gre...arming_Swindle

I haven't seen this show, or Al Gores, mostly because when I don't even begin to understand the science, I don't particularly want to be proselytized to. How on earth would I be able to judge who was lying to me about what?