Are you saying CO2 fluoresces in infrared? I'm interested to see some reference material on that.
"If an IR photon is absorbed by a CO2 molecule, it is almost certainly exciting a vibrational mode. The molecule then drops back to a ground (vibrational) state by emitting one or more IR photons ..." Since the direction is random, many go back into space.
Since the direction is random, many go back into space.
But 50% don't. Besides, that's only true for the outermost layer of CO2 molecules. Layers above will reabsorb emissions from below and return 50% back downward. Each time a little energy is lost as heat, which is in the atmosphere. Even if only 0.0001% is lost in each molecule it only takes a hundred thousand "interactions" for 100% of the heat energy to end up in the atmosphere.
I know I can't convince you with the physics, so I will just solve the problem.
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