It seems some denialists are now rejecting science entirely. zzedzz, you could at least have some integrity and stop telling porkies to support you arguments. What does that say for your agruments?
Billy
Here is a comment from a climate scientist. He doesn't appear to be hiding the role of water vapour as you suggest.
http://www.realclimate.org/index.php?p=142
vapour is indeed the most important greenhouse gas, the issue that makes it a feedback (rather than a forcing) is the relatively short residence time for water in the atmosphere (around 10 days). To demonstrate how quickly water reacts, I did a GCM experiment where I removed all the water in the atmosphere and waited to see how quickly it would fill up again (through evaporation from the ocean) . The result is shown in the figure. It's not a very exciting graph because the atmosphere fills up very quickly. At Day 0 there is zero water, but after only 14 days, the water is back to 90% of its normal value, and after 50 days it's back to within 1%. That's less than 3 months. Compared to the residence time for perturbations to CO2 (decades to centuries) or CH4 (a decade), this is a really short time.
