Just to add to that, we know the increase in the atmosphere is mostly due to fossil fuels because that co2 source has unique isotope signatures compared to othe

Just to add to that, we know the increase in the atmosphere is mostly due to fossil fuels because that co2 source has unique isotope signatures compared to other sources like rotting plants and forest fires, and we know the basic plexiglass box scenario is actually playing out from satellite observations, which directly observe that it is co2 (and methane) spectra of heat specifically that is being blocked, not other wavelengths, and that the degree of change is in accordance with what would be expected given the amount of co2 we have added. In other words everything is very clear, it all adds up, it has added up and been clear since the early 1990s.