[SampleMan]

We are told that CO2 is a major greenhouse gas and trace increases cause global warming.

Mars = 96% CO2
Earth = 0.04% C02

I wonder why Mars isn’t burning up.

[21twelve]

I posted similar earlier upthread.

The main “Greenhouse Gas” for the earth is water vapor, and accounts for about 60% of the effect. Almost all water vapor is natural (greater than 99%).

CO2 accounts for about 3.8% of the effect, and humans account for about 3.4% of that CO2 (so 96%+ of CO2 is natural).

Now, if we can only figure out a way to tax the natural water vapor we could REALLY make some money. (Oh - I mean “really stop global warming”)

[Ozark Tom]

Atmospheric density is a better measure of heat trapping of solar input. Water vapor content next most important consideration.