Climate change derives from Stefhan-Boltzmann’s law together with the spectral dependence of the emissivity of various gasses. Stefhan-Boltzmann’s law has fundamental theoretical and experimental support.
This is the basis upon which climate models rest. This basis is unquestioned.
The debate sets aside a founding principle of EA.
In the canonical story of the playpump, we had an inventor who imagined the future benefit of his dual use water-well playground. He failed. We learned that we waste money when we rely on how well we imagine our ideas will work. We learned that we need to build and measure the results.
Those of us who speculate on their efficacy of curbing extinction risk and those of us who speculate on their improvement of future well being are all in the same boat as the inventor of the playpump.