AN INCONVENIENT TRUTH
The reviews you've heard/read most likely have told you that this film is depressing and no time is spent explaining how to reverse or at least halt the devastating effects of global warming.
That's not true.
We have to realize that, in America at least, we are bombarded by information from a conservative media that claims to work under a liberal agenda. Very little of the information in this movie was new to me personally; the information is out there, but it's not presented to the general public in the readily accessible form that it should be.
Take, for instance, the check-out boy at Best Buy who, upon hearing that we had just been to see this movie, told my mother and I, "See, global warming is a joke because the temperature has been going up since the last Ice Age."
Do not be this boy. Do not be the person who says something stupid under the impression that you know what you're talking about. You are perfectly able to educate yourself and not be the subject of ridicule in your place of employment. Al's making it easy for you...all you have to do is go to the movies.
Like he so clearly states throughout the film, this is not a question of whether we have to compromise economics for our environment. This is a question of whether or not civilization is going to survive the inevitable effects of human activity should no changes be made. And we're talking BIG changes, people.
So see this movie. The least you can do for yourself is be informed.