by Andy May, September 2, 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 the recent global warming is and how we know the recent observed increase in CO₂ is due to human activities. In Part B we will examine their thoughts on questions three and four.

3. How do we know that the increase in CO₂ and other greenhouse gases in the atmosphere have caused most of the recent global warming?

4. 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.

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