A slew of internal Exxon documents unearthed by researchers and journalists over the past few years have shown that the company was aware of the link between fossil fuels and climate change at least as far back as the 1970s.“I see this as ‘Exxon knew 2.0,’” Supran said, referring to the #ExxonKnew campaign launched by climate activists in the wake of earlier revelations that Exxon has long known about the link between its products and climate change.Casting ‘doubt and uncertainty’ Despite its own modeling showing fossil fuel use would lead to global warming, Exxon’s public communications raised doubt about climate change, including taking out ads in major publications suggesting climate science was poorly understood and scientists were divided.A 2017 peer-reviewed study, which Supran co-authored, examined nearly 190 public and private communications from the company and found that while the majority of internal documents acknowledged human-caused global warming, most of its public statements expressed doubt.Exxon rejected these findings at the time as “inaccurate and preposterous.” In 2021, a then Exxon lobbyist, Keith McCoy, was captured on an undercover video appearing to confirm that the company sought to undermine climate action."