I'm not sold on global wwarming being a result of human intervention on the planet. It is conceivable to me that it is a cycle.
Even so, I do recgonize temperatures have been rising which in turn create a bit of a sticky situation. There is concern for global warming. It should be taken seriously no matter what is to blame for it happening.
Here's a film i'm more interested in though:
http://www.freedomtofascism.com/w_high.html