by Andy May, September 3, 2018, in WUWT

In Part A of the Great Debate series (see here) we discussed Dr. David Karoly’s and Dr. William Happer’s arguments regarding how unusual recent global warming is and how we know the recent observed increase in CO₂ is due to human activities. In Part B we examined their thoughts on questions three and four. Number 3 is “How do we know that the increase in CO₂ and other greenhouse gases in the atmosphere have caused most of the recent global warming?” Number 4 is “Climate models have been used to compute the amount of warming caused by human activities, how accurate are they?”

For an introduction to the debate and links to the original documents see Part A. In Part C we will examine the predictions that global warming and more CO₂ are dangerous and that we (as a global society) need to do something about it.

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