[justa-hairyape]

...but none of that changes the fact that to make AGW go away as an explanation for last 200 years of global warming you have to find some way to falsify the basic physics and chemistry of greenhouse effects.

200 years ? So I take it now that we are considering the Steam Engine as a significant AGW factor ?

[M. Dodge Thomas]

200 years ? So I take it now that we are considering the Steam Engine as a significant AGW factor ?

1800 forward is roughly the point at which industrial economies first began to produce significant quantities of CO2 and other GHGs to the atmosphere. And yes, the increasing use of coal - largely for the production of steam power - was one of the first major industrial contributions. It took about 50 years forward from that point for things to really take off.