Environmental News Network: The father of fracking, George Mitchell, passed away July 26, leaving many to think about the legacy he leaves behind. Though he didn't exactly invent fracking, the Houston native revolutionized the process by introducing horizontal drilling in the 1990s. Even more than two decades later, Mitchell's process of fracking is still a touchy subject. Though many are thrilled by the natural gas goldmine his drilling taps into, a lot of controversy surrounds the process, especially where the environment...