[Elsiejay]

Has someone demonstrated conclusively that the amount of CO2 in the earth’s atmosphere has the capacity to absorb enough solar long wave back radiation to significantly affect the temperature of said atmosphere? Is radiation absorption saturation being considered?

[justa-hairyape]

Its a logarithmic response curve. We simply wont get much more direct warming from increasing CO2 levels now. What they count on is mythical positive feed back via an increase in water vapor due to the increased warmth from the CO2.

[Olog-hai]

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Has someone demonstrated conclusively that the amount of CO₂ in the earth’s atmosphere has the capacity to absorb enough solar long wave back radiation to significantly affect the temperature of said atmosphere?

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Not a soul has, thus far. On top of that, the IPCC's "climate models" exclude H₂O, which distorts their results, and uses CO₂ as their "base" as though there were no water vapor in the atmosphere, which is junk science.

Way too much emphasis on a gas that consists of a mere ³⁹⁄100,000 of the atmosphere.