The likely reason for that failure is that while the models recognize that increased CO2 itself will not produce a big, catastrophic increase in global temperatures, the models assume that the very small amount of warming caused by increased CO2 will result in much larger temperature increases caused by positive feedbacks.

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Analysis in the 70s and 80s variously suggested that high pressure, high temperature and low humidity were associated with positive emotions - basically, nice weather seemed to put people in a good mood.

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

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Now, a study has uncovered a third part of the brain that, at least in mice, shows positive signs of neurogenesis: the hypothalamus, associated with body temperature, metabolism, sleep, hunger, thirst and a few other critical functions.

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