What do you think about Global Warming?

I have heard all of the jokes and comments about what is happening in this world with the current weather. I have read that many people feel that there is no way that man's actions can effect what is happening with our climate. The one that people seem the most upset about is the new green jobs and efforts that are made to make less of an environmental footprint. They say use the resources that we have and do not worry about anything else. Anyway this is a subject that brings up a lot of debate. I want to hear your comments on this topic as this seems to stir up a lot of emotion from both sides of the issue.