[Redbob]

And after CO2, when everybody’s driving little hydrogen-fuel-cell-powered S*boxes, it will be conveniently discovered that water vapor is - surprise! surprise! - yet another “greenhouse gas.”

Yes, in case you were wondering, those ARE in fact sarcasm quote marks above.

[GRRRRR]

Sarcasm isn’t needed. Water vapor in fact is the largest atmospheric component. It’s a key part of smog, haze and other naturally occuring ‘pollution’. Trees excrete billions of tons of water vapor every day...

Clouds...well, you know what clouds are made from....

[Freedom Dignity n Honor]

Without that CO2 our plants and trees will suffer since CO2 is what plants take in and put out O2.

With that CO2 we might actually have more and lusher forests and plants.

I'll never understand these pagan, gaia worshipping, idiot environmentalists.

[Gondring]

And after CO2, when everybody’s driving little hydrogen-fuel-cell-powered S*boxes, it will be conveniently discovered that water vapor is - surprise! surprise! - yet another “greenhouse gas.”

Please let me know who denies that it is.

If water vapor is not a major greenhouse gas, then the climate-change folks' case falls apart, since water vapor acts to provide a positive feedback to CO2 forcings.