Exxon knew about climate change long ago

04:23

The oil giant's top scientists were clear-eyed about the potentially devastating impact of fossil fuels. But the company chose to raise doubts among the public. Exxon issued a statement in response to our story: "Reports that claim we reached definitive conclusions about climate change decades before the world’s experts are inaccurate. Climate change is a serious issue & it’s going to take efforts by business, governments and consumers for meaningful action."