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Now the modelers can turn their efforts to Mars and explain how a planet with an atmosphere that's 95% CO2, manages to stay cold rather than have runaway greenhouse warming.

[cogitator]

Now the modelers can turn their efforts to Mars and explain how a planet with an atmosphere that's 95% CO2, manages to stay cold rather than have runaway greenhouse warming.

There's also a slight matter of atmospheric density and the amount of water vapor in the atmosphere. Water vapor is the primary greenhouse gas.