According To The Wikipedia, Hydraulic Fracturing In The United States Started In 1949. According To The Department Of Energy (doe), In 2013 A Minimum Of 2 Million Oil And Gas Wells In The United State

What exactly is hydrofracking? Hydrofracking means hydraulic fracturing, a technique in which large quantities of water, combined with smaller sized quantities of chemicals and sand, are pumped under high pressure into a drilled gas well. The purpose of hydraulic fracturing