I've replied to the Water Vapour talking point so often now, that I will just suggest you look around for my comments on it.
Thanks though, apparently this is the latest not unimportant, but clearly misguided attempt to debunk what is year by year becoming increasingly clear science.
Although at least this isn't such blantant sophistry like the stupid "but its getting warmer on Mars" reply.
And, thanks for not telling me, "it was darn cold where I was this winter".
I just read some of your replies, and most of them say "I've written about Water Vapo(u)r so often now..." so would you like to point me to one of your missives that states your position?
Most of the time the argument I hear is "well, yes water vapor is 95% of the greenhouse effect, and manmade sources of CO2 is less than 0.3% of overall greenouse effect, but that 0.3% just might be enough to tip the scales into runaway global warming."
Those are the same people who ignore a 0.2% increase in solar output as "insignificant." (Whoops, I almost said Mars was warming, too.)