The subject of Global Warming, Global Climate Change, or whatever you want to call it is not settled easily and causes great debate among alot of people. 

Frankly, I have always felt that no matter where the science ends up on this issue that it is better to do something, then nothing. Besides, energy and water conservation is always a good thing not matter what side of the argument you stand on.

Here is a link to a series of videos produced by a science teacher that takes a pragmatic look at the subject through a simple course of logic and helps show you where you should be on the subject. The Manpollo Project gives yo an introductin to this. And if you want to hear more there are other videos available.