People live permanently on this planet from below sea level to above 18K'. I live at 8,880' with substantially less O2 than right and left coasters and flat landers. In the first half of the resequestration of CO2 time after thermageddon with most life dead and rotting at high temperatures I think the O2 level could drop to 19% or less. Still not enough to affect animal life resurgence in the several million years after total resequestration. Burgeoning new plant species could bring it up to 23% before back to 20-21%.
That is with the likelihood people will not stop fossil fuel use soon enough and will also not burn enough of it for a Venus effect. Seeing the population crash, AGW, other pollution and depletion effects will keep population levels low until thermal max in 500 years or so.
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Note: Utterly WORTHLESS post below V. I never would have thought it of Wayne.
