Through much of the 1980s, Exxon researchers worked alongside university and government scientists to generate objective climate models that yielded papers published in peer-reviewed journals. Their work confirmed the emerging scientific consensus on global warming's risks...Yet starting in 1989, Exxon leaders went down a different road. They repeatedly argued that the uncertainty inherent in computer models makes them useless for important policy decisions...This eight-month InsideClimate News investigation details Exxon's early research into global warming, based on hundreds of pages of internal documents and interviews with former employees and scientists...