Here is an article by Christopher Monckton on global warming that evryone should read:

http://www.hawaiireporter.com/story.aspx?9c8600a9-6750-45cb-b7ee-c8ca6b6d3a75

I have done some analysis on global warming myself using engineering data on the absorption of infrared radiation by carbon dioxide in the atmosphere. (I did use the Stefan-Boltzmann equation, unlike the IPCC.) It appears to me that adding CO2 to the atmosphere won't add more than 1 C to the atmospheric temperature. The IPCC gets a similar number I think, but they then include a lot of positive feedbacks, which seem improbable to me. If the air temperature goes up then the air can hold more water vapor. Evaporation of water on the surface removes heat, and addds heat to the upper atmosphere when the water vapor condenses. The IPCC models do not appear to account for changes in chemical processes on the surface due to increase in atmospheric CO2 and water vapor. THese appear to cause desert areas to become more green due to increased plant growth. The models also do not appear to account for volcanic activity in the Arctic and in the Antarctic. (It would be difficult to include these effects, because, while it is known that there is activity, the extent is difficult to establish.

The article mentions that Al Gore is under investigation for racketeering due to false global warming claims in some of his "green" investment prospectus's. I'd like to know more about that.