[worldclass]

I've taken a quick look at the sites. These comments capture it nicely:

"Our current 'best guess' is that the global mean changes in temperature (including the 1940-1970 cooling) are actually quite closely related to the forcings."

GUESS!??!?! I guess they are wrong.

"However, in no case has anyone managed to show that the recent warming can be matched without the increases in CO2 "

So, instead of proving that CO2 causes GW, opponents have to prove that it doesn't....BRILLIANT!!

[cogitator]

I've taken a quick look at the sites.

Which sites?