Tyndall's work confirmed radiant heat absorption of individual elements/compounds but he didn't do experiments replicating the atmosphere and measuring effect of different concentrations of CO2. That is the critical science still needed to confirm if CO2 has a real significant effect or not. i.e. to prove the ACC/AGW hypothesis.Is your friend as stupid as you are? The science that provide absolute evidence that GHG's heat the atmosphere was demonstrated in 1858 by John Tyndall in England. Nobody has falsified that since then. Flapyapping trying to change the subject is evidence of a very weak mind.
Excerpt:
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Tyndall explained the heat in the Earth's atmosphere in terms of the capacities of the various gases in the air to absorb radiant heat, in the form of infrared radiation. His measuring device, which used thermopile technology, is an early landmark in the history of absorption spectroscopy of gases. He was the first to correctly measure the relative infrared absorptive powers of the gases nitrogen, oxygen, water vapour, carbon dioxide, ozone, methane, and other trace gases and vapours. He concluded that water vapour is the strongest absorber of radiant heat in the atmosphere and is the principal gas controlling air temperature. Absorption by the other gases is not negligible but relatively small. ....
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The proof was that water vapour strongly absorbed infrared radiation. ...
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Relatedly, Tyndall in 1860 was first to demonstrate and quantify that visually transparent gases are infrared emitters.
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John Tyndall - Wikipedia
Highlighting my doing.
Bottom line is that most GHGs have minor effect in heating atmosphere, other than water(H2O) vapour. Water vapour usually about 10% (Or more, varies with season and geography, etc.) in addition to components of "dry" atmosphere which is the condition reflected when we see discussion of Carbon Dioxide or Methane, etc. as a percent or part of the atmosphere.