Thirty Years On, How Well Do Global Warming Predictions Stand Up?

The short answer, is not all that well.

On June 23, 1988, NASA scientist James E. Hansen testified before the Senate Committee on Energy and Natural Resources, where he expressed his “high degree of confidence” in “a cause-and-effect relationship between the claimed CO2 induced “greenhouse effect and observed warming.”

The 30th anniversary of Mr. Hansen’s predictions affords an opportunity to see how well his forecasts have turned out.

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