Just more confirmation that the idiots are running the show! The concept, as I understand it, is based on James E. Hansen’s work in particular the way he believed that atmosphere would become “Opaque” to IR at the surface and then move up layer by layer until it reached the stratosphere. Since the bulk of the atmosphere is in the tropics it would follow that the bulk of the CO2 would also be there and that the bulk of the sun’s incoming radiation would also be there; therefore this is where the theory would dictate the effect to be that they based the models on. Using an unrealistic CO2 forcing doesn’t help, but it was needed to make the models work. Since actual measurements have not shown this to be the case there must be other factors in play.