"Throughout much of the 1980s, Exxon earned a public reputation as a pioneer in climate change research. It sponsored workshops, funded academic research and conducted its own high-tech experiments exploring the science behind global warming. But by 1990, the company, in public, took a different posture. While still funding select research, it poured millions into a campaign that questioned climate change.... How did one of the world’s largest oil companies, a leader in climate research, become one of its biggest public skeptics? The answer, gleaned from a trove of archived company documents and the recollections of former employees, is that Exxon, now known as Exxon Mobil, feared a growing public consensus would lead to financially burdensome policies."