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.”
Those numbers were about right, too. It was precisely ten years later—after a decade in which Exxon scientists continued to do systematic climate research that showed, as one internal report put it, that stopping “global warming would require major reductions in fossil fuel combustion”—that NASA scientist James Hansen took climate change to the broader public, telling a congressional hearing, in June of 1988, that the planet was already warming. And how did Exxon respond? By saying that its own independent research supported Hansen’s findings? By changing the company’s focus to renewable technology?
That didn’t happen. Exxon responded, instead, by helping to set up or fund extreme climate-denial campaigns.
