Yes, TIA, that's exactly what I would expect there has been...an exponential rise in CO2 production since the beginning of the industrial revolution. Matter of fact, that's what I intended to convey in my previous post. I simply used the wrong words when I said "a fairly much steady increase".

We do not disagree at all when it comes to that.

Can you find similar climatic charts that go back 2 or 3 thousand years? I'd be interested to see what mean annual temperature ranges have been seen around the world in that peroid. For instance, what was going on when the Vikings were farming in Greenland? And why was Greenland so much warmer then than it is now?

One thing for sure. It had nothing much to do with human contributions to global warming.