The sharp drop in oil prices has already roiled markets and pummeled energy companies. But its impact on oil production and climate policies is likely to last years past the moment when prices have recovered. The shale boom in the U.S., where oil production has nearly doubled over the past 10 years, and the refusal of the Organization of the Petroleum Exporting Countries to cut output, have contributed to a glut on global energy markets. At the same time, low growth in Europe and emerging markets is holding down demand, upending long-held assumptions of scarcity and ever-increasing prices. “The expectations that have governed the world for over a decade have been overturned by a new reality,” says Daniel Yergin, vice chairman of energy research firm IHS and author of several books on the global oil market. Since the beginning of the year, investment […]