What Exxon Knew About Climate Change
But it turns out Exxon didn’t just “know” about climate change: it conducted some of the original research. In the nineteen-seventies and eighties, the company employed top scientists who worked side by side with university researchers and the Department of Energy, even outfitting one of the company’s tankers with special sensors and sending it on a cruise to gather CO2 readings over the ocean. By 1977, an Exxon senior scientist named James Black was, according to his own notes, able to tell the company’s management committee that there was “general scientific agreement” that what was then called the greenhouse effect was most likely caused by man-made CO2; a year later, speaking to an even wider audience inside the company, he said that research indicated that if we doubled the amount of carbon dioxide in the planet’s atmosphere, we would increase temperatures two to three degrees Celsius. That’s just about where the scientific consensus lies to this day. “Present thinking,” Black wrote in summary, “holds that man has a time window of five to ten years before the need for hard decisions regarding changes in energy strategies might become critical.”