" . . . Confusingly, oil shale has nothing to do with fracking, a technique for extracting oil and gas from a different sort of shale through horizontal drilling and hydraulic fracturing. America is blessed with prodigious quantities of both types of shale. Its fracking pioneers have successfully exploited one type, transforming the country’s energy supply. But hitherto, squeezing the energy out of oil shale has generally proved uneconomic, and even more environmentally unsound than other forms of fossil-fuel extraction.
However, a second shale revolution is in prospect, in which cleaner and more efficient ways are being found to squeeze the oil and gas out of the stone. The Jordanian government said on June 12th that it had reached agreement with Enefit, an Estonian company, and its partners on a $2.1 billion contract to build a 540MW shale-fuelled power station. Frustratingly for Jordan, as it eyes its rich, oil-drenched Gulf neighbours, the country sits on the world’s fifth-largest oil-shale reserves but has to import 97% of its energy needs. . . ."