80 Alan wrote: Do you know what happened about 150 yrs ago? From your statement I’d guess you don’t.

Guess again. That is exactly why I stated the doubts as I did. But let’s take YOUR inference. We might be coming out of “an ice age” ie. warming for whatever natural reasons added onto whatever the effects are of the added co2 in the atmosphere.

Can we clarify yet one more time: Yes, the earth warms and cools for “natural” reasons and no one should say otherwise, BUT that is not to say that the added presence of CO2 cannot accelerate “natural” warming. I have said that now approximately ten times already on PJM, but that the hell, make it eleven!