[AFPhys]

When I write CO₂, I implicitly include any 'forced' increase in water vapor by that phrase. It is not clear to me that experimental evidence bears out that H₂O vapor is increased by the CO₂ as computer models claim it will.

A never-mentioned fact that keeps coming back to me through all the discussion of CAGW is that a variation in cloud cover of merely one percent may well account for ALL the temperature variation of Earth over the 20th century, and is outside the purview of the influence of CO₂. We have no idea how to measure that variable accurately enough, and have no such accurate record of cloud cover during the last 100+ years. To my way of thinking, that one item scuttles all efforts to correlate reasons for the variation of temperatures.

[Marine_Uncle]

I actually do appreciate what you wrote. I'm on same mind set.
So little until recently has been considered in the role various layers of clouds play within the troposphere upward into those thin lower layers of the stratosphere.
Including how aerosols may be effected in those upper layers, etc..
So much good science yet remains to be fully undertaken in these areas. No response is required.