I said 120 ppm
LESS atmospheric CO2, not that it was 120 ppm. The relevance is that for the past 3 million years there is a NATURAL fluctuation of temperature and environmental uncertainty that has nothing whatsoever to do with atmospheric CO2.
Climate fluctuation and uncertainty are hallmarks of our bipolar glaciated world because of how landmass is configured in the northern hemisphere and how heat is circulated from the Atlantic to the Arctic.
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