zzedzz - there's also global dimming. Particulate pollution in the atmsophere has caused temperature reductions on the surface of the earth. A lot of testing was done after 9/11 when there were no vapour trails/contrails over the US. There were observed temperature increases in the days after 9/11 when there were no aircraft vapour trails due to higher levels of solar radiation reaching the surface.
Sure, a lot of things affect the climate. It is incredibly complex. But to say that CO2 has not driven temperature in the past and then to apply that to the scenario we face today is false and misleading and this guy needs to take a long hard look at himself.
If you don't believe in anthropogenic climate change by now then nothing I can say will ever change that.
