One of the things misleading about that graph is the starting point of about 200 PPM.
It makes the current level of C02 seem very high at 380 PPM or so.
Well, past history shows a peak of 300 PPM even on that graph.
So were freaking out over an 80 PPM more then past few hundred thousand years of history shows?
And there are professionals that question the accuracy of the ice core data as well to begin with.
Bottom line though. There are large natural cycles that we have absolutely no control over.
The first link I gave in my previous posting has this intriguing fact:
“For example, during the Ordovician Period 460 million years ago CO2 concentrations were 4400 ppm while temperatures then were about the same as they are today.”
That’s more than 10x today’s numbers and I suspect that since all we can measure today are averages over long periods of time, there were probably some quite significantly higher spikes over brief periods. So the CO2 concentration impacting temperature argument may not be the major driver of temperature.