Except that far back in time life was still evolving , plants didn't even exist on the far left of the graph & there wasn't any oxygen. Comparing that far back in time is like comparing apples & oranges, there were still massuve volcanic eruptions etc. In the last 800,000 years there is an indisputable link between c02 & temperature.
The stance that the earths climate has always changed therefore there's not a problem is moronic.
