What is the temperature rise, after the effects of both positive and negative feedbacks, from a doubling of atmospheric CO2-e?

FORBES: Not Quite Professor Krugman, Not Quite

In contrast, fundamental and value investors produce negative feedbacks by buying when prices have fallen and selling when prices have risen.

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We also know that there are negative feedbacks, say, greater plant growth and possibly greater carbon storage in the soil as a result.

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The real, emerging science, as the Heartland publications indicate, is that the feedbacks are more likely to be offset by negative feedbacks, resulting in a much smaller net temperature change.

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In fact, we know that some set of extremes the negative feedbacks must overwhelm the positive as otherwise, those past times when we have higher CO2 and thus temperatures would have led to a runaway Venus like effect.

FORBES: Not Quite Professor Krugman, Not Quite