The chief executives of Royal Dutch Shell PLC and ExxonMobil Corp. laid out contrasting visions this week for reducing fossil-fuel emissions, illustrating a divide between American and European energy companies ahead of a United Nations climate-change summit. Rex Tillerson , CEO of U.S.-based Exxon, said Wednesday that innovation, free markets and competition were the best tools for curbing emissions. His remarks came a day after Ben van Beurden, chief of Anglo-Dutch giant Shell, said technology wouldn’t be enough to bring about emissions cuts, and that governments needed to step in. Both executives were speaking here at the Oil and Money conference, co-hosted by Energy Intelligence and the International New York Times. The differing messages show that the oil industry hasn’t come up with a unified response to climate change, even as its leaders become increasingly vocal about it in the run-up to the U.N. summit in Paris. Nearly 200 […]