http://www.geocraft.com/WVFossils/Ca...s_climate.html contains a curve entitled: "Global Temperature and Atmospheric CO2 over Geologic Time" which alleges that during the Devonian, Triassac, Jurassic, and Cretaceous periods the CO2 concentrations and global temperatures were well above todays levels. Life abounded during these periods. Only during the Ordovician, Carboniferous, and early Permian were levels near those of today. If this curve is moderately accurate (I wonder how it could be), we should avoid panic for a few more hundred years. I assume the science used to generate the curve is on par with that used in the better climate modeling and that the accuracies are equivalent.

Note that if this curve can be believed, the Earth is unusually cool at the current time.

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For those inclined to oppose human meddling with the structure of the universe or the composition and configuration of objects and groups of objects within the universe, consider:
Whether there is a limit to the magnitude of a modulation of chaos below which order remains invariant? Or, is order but a fiction invented by perspectives applied over finite, however large, time intervals?