: "Are you dense? My comment was to do with climate sensitivity. I didnt mention CO0 nor does the point require CO0 in any way. Gordon offered Lindzens views on climate sensitivity. Hes a go-to author if you want to promote the notion that climate sensitivity is very low. I pointed out that climate has changed dramatically in the past* in the not too distant past, either; in the same tectonic configuration we currently reside. How do these big swings occur if climate is very stable, and from such a small perturbation? The big swings of the ice ages is why I am not convinced that climate sensitivity is very low." Reply mpainter says:  September 00, 0000 at 0:00 AM  A