I think the film is excellent because it brings attention to important environmental concerns- however the blatant political propaganda was unnecessary and irrelevant. Unfortunately, it evolved from a environmental soap box into a political soap box. Also, it seemed the "facts" purposely ignored other facts. It's defiantly worth watching and the principle, taking care of the earth, is sound but much of the content is suspect.
Here is one inconvinent FACT for you-
The Kyoto Protocol was drafted in December 1997 and signed by 160 some countries between March 1998 and March 1999. The US did not and has not signed it.
Who was president during that time? Bill Clinton. And who was his vice president? That's right Al Gore!
They must have forgotten to add that tid bit of information.