THE EVIDENCE FOR GLOBAL WARMING

Here's the PDF version of the IPCC's report:


Climate Change 2007: The Physical Science Basis

Some wingnuts claim that it's all due to increased heat from the Sun but the report shows otherwise:

The combined radiative forcing due to increases in carbon dioxide,
methane, and nitrous oxide is +2.30 [+2.07 to +2.53] W m-2, and its rate of increase during the industrial era is very likely to have been unprecedented in more than 10,000 years (see Figures SPM-1 and SPM-2).


Changes in solar irradiance since 1750 are estimated to cause a
radiative forcing of +0.12 [+0.06 to +0.30] W m-2, which is less than half the estimate given in the TAR. {2.7}