...causing global warming knows that CO2 is only a small component
of the greenhouse affect. And that water vapor comprises
more than 90% of the greenhouse affect."

This is wrong. Let me explain to you again why it is wrong, because you have obviously not been paying attention.

The atmosphere is relatively transparent to visual radiation in sunlight, and it penetrates to the earth's surface where it heats up the land and the oceans and the lower reaches of the atmosphere in contact with the land and seas. These materials re-emit this radiation in the far infrared region of the spectrum into the atmosphere, which is highly opaque to infrared, mostly because water vapor is an extremely effective IR absorber, as you point out. It is difficult for this heat to radiate back into space; this is what causes the greenhouse effect and makes our planet warm and suitable for life.

However, the earth's surface is not a molten ocean of lava, so this infrared radiation must ultimately escape, continuously being absorbed and re-emitted by millions of molecules, slowly working it's way up through the atmosphere until it reaches the edge of space, a near-vacuum exposed to the bitter cold of the universe. At this point, with nothing to stop it, the infrared radiates into the void. Eventually, the system reaches equilibrium, with the IR light energy escaping equal to the visual light energy arriving. It has to, or the earth's surface temperature would become like Venus.

However, at high altitudes, it is so cold that water cannot exist as a gas, it freezes into a solid, so the moisture does not play a role as a greenhouse gas where it matters, at the atmosphere/space interface. But other greenhouse gases, primarily CO2, can exist as a gas there, and as CO2 concentrations increase in the upper atmosphere, it becomes harder for the IR to escape, so the earth heats up until it reaches a new equilibrium. As the earth gets hotter, sooner or later it will get rid of this excess heat by emitting more radiation, but it will have to occur at a higher temperature. The hotter an object is, the more it radiates (look up Black Body Radiator in WIKI).

CO2 is a extremely effective in this role because it is highly opaque to IR, and as the concentration of CO2 increases in the atmosphere, more and more works its way to high altitudes and the ability of the upper atmosphere to radiate heat away from the planet decreases. This will cause the planet as a whole to heat up until it reaches equilibrium at a higher temperature. It doesn't matter how much water there is at the surface.

Water vapor has nothing to do with it. There is no water vapor up there.