But my point is higher growth rates/greening are happening with...

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    But my point is higher growth rates/greening are happening with higher CO2 levels in the real world. The Durrasic and Triassic periods were a time of mega fauna and flora with CO2 levels up to 6 times higher than now and slightly cooler temperature.
    Im not convinced that CO2 at this level or 2 or 3 times higher will be a problem.

 
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