According to Royal Dutch Shell, solar could overtake oil as the world’s dominant energy source within the next 50 years. While analysts have long debated how much and how quickly solar could displace oil, this is probably the first time that a supermajor oil company has – through its own analysis – come up with quantifiable numbers. Chevron and Exxon-Mobil, two other supermajors who are increasing their renewable portfolios at exponential rates, also foresee a similar picture, although not quite as quickly.