Hydraulic fracturing, or fracking, is the most important energy industry development in the past few decades, unlocking value for U.S. natural gas companies.
Its extensive use in the United States is completely reshaping the world energy scene.
But there is one question that lingers over the U.S. energy industry: Is fracking safe?
One of those saying fracking is 100% safe is sometimes controversial oil billionaire T. Boone Pickens.