One of the reasons we have a lot of normally intelligent people believing in man made global warming is the fact that the people behind the computer models predicting same are adept at amazing you with their technical mumbo jumbo. They snarkly consider themselves the "Smartest guy in the room".
The following 10 min video is amazing. From Climate Skeptic Blog. It takes you through an explanation of the current climate modelling in simple to understand terms. It points out the key assumption baked into the model that result in predictions of "catastrophic temperature rise "with increases of carbon dioxide and explains the so called "tipping point" , once reached it is too late for mankind, which Gore et al are always claiming is "just 5 years ahead"
You owe it to yourselves to watch this video carefully.
Whether you believe in man made global warming or not you cannot watch this video and still say "the science is settled" or that "the debate is over".
Also, keep in mind that because the politicians think these guys are the smartest guys in the room they are pouring $B into this. Talk about incentive to predict disastor.