Here is a paper by Lord Monckton on global warming. Appendix I has some analysis that illustrates some of the issues. Lord Monckton refers to the Stefan-Boltzmann constant and the Clausius-Clapeyron equation. It is doubtful that Al Gore could tell anyone what those equations represent. It is curious that these are not even mentioned in the IPCC's reports.

http://scienceandpublicpolicy.org/monckton/cost_and_futility_of_trading_hot_air.html