On a hot day in 1988, Hansen told this to the US Congress

His Bold Statement Transforms the Debate On Greenhouse Effect

By JOHN NOBLE WILFORD

Published: August 23, 1988

He held up one die representing the climate for the period 1950-1980. Two sides were white for an average summer, and two other sides were blue for colder-than-average summers. The other two sides were red for hotter-than-average summers. Thus, on a roll of the die for that period, there were two chances in six of having a hot summer at any given location in the country.

Then Dr. Hansen picked up the die for the 1990’s and explained:

”If our climate model calculations are approximately correct, the greenhouse warming in the 1990’s will be sufficient to shift the probabilities such that the chance of a hot summer in most of the country will be in the range of 55 to…