Here is a good brief summary of what is wrong with the man-made global warming (or is that CO2 induced climate change)hypothesis from the Huffington Post:

http://www.huffingtonpost.com/harold-ambler/mr-gore-apology-accepted_b_154982.html

I don't know who Harold Ambler is or what his expertise is, but this is a good summary. In my opinion, whether or not global warming is actually happening at present, the AGW hypothesis of Al Gore is one of the biggest frauds in history. The computer projections of general circulation models are simply not science in any accepted sense, and statements that most all competent climatologists agree that "the science is settled" is an outright lie.