As profits and prices plummet, the oil conglomerates – some of the world’s biggest companies – have been warned they must change their ways or face extinction.
Saudi Arabia says it plans to be less dependent on oil revenues in future – but will it grasp the opportunity to become a world leader in solar energy?
For the first time, the major economies of North America—the United States, Mexico, and Canada—are simultaneously eager to display ambition and leadership with respect to international climate cooperation.