I finally saw Al Gore's powerpoint movie "an inconvenient truth". This was excellent. The science is very accurate. I know what I am talking about...I've had undergrad courses in meteorology, graduate course in Physical oceanography, and several in Atmospheric science (although did not do well in the A.S. courses so went back to geology.... I currently have a paper submitted to the Journal "Geology" on west Antarctic glaciation. Also, climate is an interest to me so I pay attention when I see something on this. (I'm establishing credibility here with those details).

Most of the science in the movie were simple measurements and simple physics. Unlike what Gore said on T.V. (e.g., The Daily Show), I did not find any of what was said in the film to be extreme (even if I found what he was saying on Daily Show to be on the catastropic side of what I have heard, he could be right).

The little problems I saw in the documentary were irrelevant to the point:
He shows ice calving on small scale off glacial front...that would happen whether glacier was advancing or retreating; he showed Greenland with a Mercator projection (which is common) that makes it look much larger than it actually is at a critical point of movie; the reconstruction of South America to Africa was not quite right (matched coastlines rather than shelves/continental crust. That is about it.

Even when he showed the effect of what would happen with a 20 meter sea level rise on various coastline (which would happen is either West Antarctica or Greenland melted), he did not say that this would happen this century (I think it would take longer and from what I have heard and read my best guess is that it will be more like 1 meter this century...but lots of other bad things probably will happen this century and are already happening).

I learned a few things, like that CO2 has not been over 300 parts/million in the last 650,000 years (is now 380).

Evaluating information such as in this movie is really not so different from evaluating earthquake predictions on this page: what data support the conclusion?

See the movie rather than believe what non-scientists think!
Chris