Yep. Am aware of that. What the psuedo scientific proponents of AGW claim is that the insignificant warming possible from CO2, causes an increase in water vapor which then actually causes significant warming. They have no actual experimental proof of this however. The hard facts are that the amount of vapor a single moderate El Nino releases dwarfs the theoritical AGW input. During El Nino solar energy gets transferred into water vapor.
I don’t have the link now, but the water vapor supposedly caused by man’s CO2 is shown to also be too insignificant to cause any issues-