There's nothing to the AGW theory but hot air.
AGW depends on rigged simulations. I've worked off and on in computer simulation for years, and anyone who actually DOES that work knows that it's EASY to get the "correct" answers by tweaking parameters, input data, boundary conditions, etc.
Before the publication of the infamous ecofascist "hockey stick" temperature graph, scientists believed that there was a similar warming period in the middle ages. The key "evidence" in overturning that belief was tree ring data that was scant, incomplete, misinterpreted, and possibly fraudulent.
The IPCC report is under the auspices of the UN, an overwhelmingly statist, anti-US, anti-capitalist organization. Very few of the signatories did any actual original research. Basically, it's a "vote" by scientists, many of whom get their funding from governments which have signed on to AGM because of the huge growth in statism it promises.
The work done at East Anglia university, an important AGW research center, has been roundly criticized for its deficient methods, and it also claims it "lost" its original data.
The hysterical, anti-scientific tone of the warmists can be seen in their shrill declarations that "the debate is over".
The reason why the worldwide leftwing has latched onto this theory and won't let go no matter how many times they are whacked (metaphorically
) is that in it they see the possibility of realizing the dream that they've had for a hundred years: the ultimate defeat of freedom, capitalism, and democracy, and the imposition of a superstate which controls everyone's life down to the most minute detail.