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And exactly how does your chart prove that the increase is "unprecedented".  We both know that it isn't which leads you to jump immediately to 400,000 years which leads me to ask why you choose 400,000 years to which you ignore the answer that if you go back more than 400,000 years, you see CO2 levels as high as 7000 ppm and no runaway global warming and ice ages with higher CO2 levels than the present and all manner of evidence that CO2 is not a driver of the climate.


Your chart shows change.  It does not prove that the change is unprecedented.


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