When I viewed the documentary called "The Great Global Warming Swindle" I was more than a little suspicious.
Were these scientists who were quoted really scientists, and if so, where did they get their funding?
The source I always ALWAYS turn to when I'm concerned about scientific issues is the podcast "Geek Counterpoint." This podcast is produced by a guy who is a scientist and engineer and the information is always backed up by tons and tons of references. The host, Lorne Ipsum, uses the podcast to cut through the hysterics and misinformation which dominate the mass media, and he does it in a calm, professional manner. No name-calling, no screaming.
Lorne took on "The Great Global Warming Swindle" a few weeks ago and documented exactly the problems with each argument presented in the film and the extensive questionable associations that the featured "scientists" had with oil companies and lobby groups.
I especially find it very interesting that the scientists who are the most-quoted advocates of the "Swindle" are some of the same scientists who were happy to say that cigarette smoking didn't cause lung cancer in the 70s and 80s. Can you say "PhD For Sale???"
I strongly suggest that you listen to the Geek Counterpoint podcast on this documentary and read the Website entry as well. I think you'll be very happy you found it.
I also found it useful to go through the Geek Counterpoint podcasts on global warming preceding this episode, including Climate Change 101, Climate Change and Logical Fallacies (The Argument Clinic), Climate Change - The Skeptics Pt 1, Climate Change - The Skeptics Pt 2, Climate Change - The Skeptics Pt 3 (Naming Names), and a quickie post (not a podcast) called More on the "Swindle."
Geek Counterpoint Podcast Home Page
"The Great Global Warming Swindle" Geek Counterpoint episode
"The Great Global Warming Swindle" trailer
Recent evidence of Exxon's attempt to bribe scientists to criticize global warming
NOTE: The film had been viewable online through Google Video, but it looks like it has been removed, probably for copyright violations, would be my guess.