At the end of the movie, the audience applauded.
This was on a Thursday, when there usually aren't too many people, but the theatre was over 3/4 full. I had to wait in line to get in.
I have a confession to make. My background in oceanography and meteorology has made me familiar with many of the arguments and much of the evidence regarding global climate change and global warming. Between 1991-1996, I worked with an oceanographer with an international reputation in global climate change, modelling feed-backs that could and may have turned off the thermohaline circulation in the ocean (the so-called global conveyor belt). My current research supervisor is also internationally recognised in climate change research. Throughout my career I have attended many presentations by good researchers on climate and climate change, and have tried to keep an objective viewpoint on this highly politicised issue.
What I'm trying to say is that I have learned enough to usually spot false claims and skewed data. In my considered opinion the new movie narrated and presented by Al Gore is on the whole honest, with carefully considered arguments. Admittedly he has an agenda to promote, but as alluded to in the title, it is based on evidence and not wishful thinking. And I have to admit that I learned a fair bit, mostly about all the evidence can effectively be put together into an incontrovertible argument for the logical and moral necessity for fighting climate change.
What impressed me most about the movie was the overall argument and the choice of facts that he presented. I have to admit that I attained a new perspective on data and conclusions that I had learned over the years. The presentation of this evidence is anything but dry, and he is able to relate it to his own life, and to ours. Gore is able to explain a number of fairly subtle physical mechanisms and their climate implications clearly and (basically) correctly. He also avoids trying to explain more subtle processes that wouldn't make sense to laymen. Gore obviously has and has had access to information and to world experts, and he has the ability to cut through technocratese to the main points and proof of a given argument.
Finally he shows how political will can and has made a difference in the world climate. For example, he discusses how CFC ban greatly reduced the ozone hole problem. He also shows how becoming green can be profitable, and how the United States can follow the rest of the world and even provide leadership in the global warming crisis. As an aside, did you know that China has cleaner automobile emission standards for its vehicles than either Canada or the U.S.?
This is one of the best documentaries I have seen, and one of the best scientific presentations of the accepted data and theories. It is interesting, exciting, compelling, and the clear way he presents the evidence without oversimplifying hits you over the head like a pile-driver. But throughout he maintains a compassionate and understanding rapport with the audience; he does not declaim and neither does he preach and browbeat.
Go see it. More important, get people who doubt or don't care to go see it. You will not be disappointed.