I finally saw Al Gore's film, An Inconvenient Truth. I was really impressed with the professional and effective style it was made in, and I would urge anyone who has not yet seen it to do so. If you haven't seen it for political reasons, ie. disliking Gore, then you are really missing out on an imperative message. This film is not about politics, it is an international environmental crisis, and if we don't raise awareness and prompt action then we will have a global disaster on our hands.
It presents the information in a way as to be virtually indisputable. I think that most people don't understand that global warming is basically unanimously supported by scientists. The only doubts that exist about it exist in political arenas, not the scientific community.
The quote I found most interesting was one by Upton Sinclair:
"It is difficult to get a man to understand something when his salary depends upon his not understanding it."