Exxon scientist J.F. Black, memo of June 6, 1978:
"What is considered the best presently available climate model for treating the Greenhouse Effect predicts that a doubling of the CO2 concentration in the atmosphere would produce a mean temperature increase of about 2 C to 3 C over most of the Earth. The model also predicts that the temperature increase near the poles may be two to three times this value.
- J.F. Black, Products Research Division, Exxon Research and Engineering Co.