Energy experts say fracking is the key to American energy sustainability. Some environmentalists say it's the worst human innovation ever. Either way, it's happening at a record pace in Oklahoma.
Hydraulic fracturing, or fracking, is the process of creating small cracks in rock formations thousands of feet below the surface to release trapped oil and gas. To create those cracks, producers push huge amounts of water, sand and chemicals into the rock formations.
6/7/201 Related Story: Oklahoma Earthquake Swarm: Lots Of Data, But Few Answers




