And yet they have attributed almost all of the recent warming trend to CO2 which is ridiculous and not supported by any empirical evidence. In fact, it is contrary to the empirical evidence.No one has claimed that CO2 is the sole controller of the Earth's climate. Ever. That it is the primary factor at present can be determined by calculation of its effects versusthat other factors. I hope I do not need to put up the radiative forcing factors graphic again, but I will if you insist.