I was going to post about this yesterday, but now I'm not as excited about it. There was a piece in the New York Times concerning Al Gore's
Inconvenient Truth movie. I hesitate to call it a documentary, because documentaries are supposed to be based on facts. True to his background as a politician, Gore has "stretched" the "truth" about the reality of global warming.
In an interview with Grist, Gore admitted that he isn't honest with people. Here's a chunk of the interview I pulled from
this article.
There's a lot of debate right now over the best way to communicate about global warming and get people motivated. Do you scare people or give them hope? What's the right mix? 
I think the answer to that depends on where your audience's head is. In the United States of America, unfortunately we still live in a bubble of unreality. And the Category 5 denial is an enormous obstacle to
any discussion of solutions. Nobody is interested in solutions if they don't think there's a problem. Given that starting point, I believe it is appropriate to have an over-representation of factual presentations on how dangerous it is, as a predicate for opening up the audience to listen to what the solutions are, and how hopeful it is that we are going to solve this crisis.
Over time that mix will change. As the country comes to more accept the reality of the crisis, there's going to be much more receptivity to a full-blown discussion of the solutions. I believe that God intended that we be good stewards of the earth. I also believe that man is not as influential in global weather patterns as some think. I'm also not a scientist. Mainly, I become distrustful of someone who resorts to alarmist tactics.
I'd suggest that you read the article in the New York Times.
I've got a link here. James Taranto's article in the opinion page of the Wall Street Journal is also good to read.
I wish people would take a step back to look at all the facts on global weather patterns.
Did you know that in the last 15,000 years of weather history that there have been 10 swings in the weather pattern, including the
Medieval Warm Period, that surpass the warming trends we are seeing now? Ask Dr. Easterbrook, an emeritus professor of geology at Western Washington University. I would ask, how can we presume to know that this shift in the global weather pattern is any different from the past. For now, I'll keep reading.