2015, the hottest on record, was also the year ExxonMobil was caught in a more than three-decade lie. Internal documents revealed Exxon knew that fossil fuels cause global warming in the 1970s, but hid that information from the public. Now it turns out that Exxon isn’t alone. A new exposé from InsideClimate News reveals nearly every major U.S. and multinational oil and gas company was likely aware of the impact of fossil fuels on climate change at the same time as Exxon. We are joined by Neela Banerjee, the InsideClimate News reporter who broke this story.