Here is an interesting article about global warming, or maybe global cooling.

http://cheatseekingmissiles.blogspot.com/2006/08/ocean-cooling-foils-warmies-theories.html

One of the major deficiencies of the global circulation models that predict the end of the world as we know it is a total failure to predict cloud action. It seems to me that the catastrophic temperature increases predicted by some of the models can only be explained by increases in the amount of water vapor in the air. The amount of carbon dioxide in the air now absorbs almost all of the energy emitted from the earth in certain wavelengths, so adding more carbon dioxide has little impact on atmospheric temperature. Somehow, in the models, the additional carbon dioxide causes an increase in the water vapor. The increased water vapor absorbs a lot of heat, increasing the atmospheric temperature. This increases the rainfall, and affects cloud cover. Some clouds reflect sunlight back to space making earth cooler, and some prevent radiation from earth from making out to space making earth hotter. It is important for the cloud effect to be modeled correctly for the computer predictions to be accurate. Since the models do not accurately depict the clouds, the predictions of the models are not reliable. One thing Al Gore doesn't seem to realize is that Global Circulation Modeling is not really science. Of course Al seems to think that science is conducted like a legal case; a judge makes a ruling that settles the issue. Mother Nature and physics just don't work that way. The thing that must be remembered about science is that a lot of famous scientists are often wrong, all at the same time.