Nonsense: Man-made CO2 global warming is nonsense?

Can you prove that man-made CO2 is causing global warming?

"If, like me, you believe that the man-made CO2 global warming theory is akin to creationism or astrology -- unscientific claptrap -- then you should also be disturbed by the latest nonsense coming from the California green lobby," wrote John McCormick of the Detroit News yesterday.

"Unscientific", John? Since when did you become a scientist?

While I believe in a man-made CO2 contribution to global warming, I don't have any problem with people that have questions about man-made CO2 caused global warming. In reality, there is more we don't know about global warming than we do know. So, almost anything is possible.

Thus, to claim man is the total cause of global warming, without any doubt, is nonsense. We might be. We might just be contributing. On the other hand, it is equally nonsensical to claim that, without any doubt, man is not causing global warming.

I've known some good scientists, John, and you are no scientist. Too many of the words coming out of your mouth sound like nonsense.