Steve Knisely was an intern at Exxon Research and Engineering in the summer of 1979 when a vice president asked him to analyze how global warming might affect fuel use.”I think this guy was looking for validation that the greenhouse effect should spur some investment in alternative energy that’s not bad for the environment,” Knisely, now 58 and a partner in a management consulting company, recalled in a recent interview.Knisely projected that unless fossil fuel use was constrained, there would be “noticeable temperature changes” and 400 parts per million of carbon dioxide (CO2) in the air by 2010, up from about 280 ppm before the Industrial Revolution. The summer intern’s predictions turned out to be very close to the mark.

Source: Exxon Confirmed Global Warming Consensus in 1982 with In-House Climate Models | InsideClimate News