The fracking of hard-to-reach oil reserves has helped the US regain its crown as the world's top crude oil producer. But even the International Energy Agency (IEA) is now worried that the shale boom has been overhyped.
The fracking of hard-to-reach oil reserves has helped the US regain its crown as the world's top crude oil producer. But even the International Energy Agency (IEA) is now worried that the shale boom has been overhyped.
