Of course the impact of CO2 is what you worry about.Ah, you're once again creating straw men by rewriting what I said.
I didn't dispute that CO2 is the driver for the projected increases in the models. I said the majority of the projected warming (about two-thirds of the total) in the models is due to the water vapour feedback.
My point is about the projected size of the impact of each, not which one is the "driver."
The impact of CO2 alone is not worth worrying about. Fuji's paper does nothing to verify the AGW hypothesis.
As you stated, CO2 is the driver, if CO2 doesn't increase then water vapour greenhouse effects don't increase.
And you still haven't answered, when I show you studies confirming the water vapour feedback effect will you then concede that AGW is real, and not just a theory?