Most of those here that accept AGW have a sufficient understanding of the science to know that there are many forcing that drive climate change. However, the forcing that is being varied the most at the moment is CO2 and those changes are anthropogenic. As Gneissic said, this is a poor attempt at a ***.
Though speaking of denial, there are those here within the 'skeptics' (used loosely) that believe that CO2 is not a greenhouse gas and that the greenhouse effect is a scam, there is no warming and the entire temperature record is a scam, that humans contribution to atmospheric CO2 is minuscule and cannot explain the increase in atmospheric CO2, volcanoes produce more CO2 than humans e.t.c.
