Quote:
Originally Posted by chuckm
During the Jurassic period, the CO2 level was at 1950ppm. Agreed or not? The earth was 3ºC warmer than present.
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Sure, but the problem is that you're creating the unstated assumption that everything else was the same then as now, which is far from being the case. Solar constant, atmospheric pressure & composition, and many other things were different, so not surprising that there might be different results.