Safe, cost-effective refinements in hydraulic fracturing (also known as fracking), horizontal drilling and other innovations now allow for the production of oil and natural gas from tight shale formations that previously were inaccessible. This video introduces the proven techniques used to extract resources from shale formations in a safe, environmentally responsible manner. Includes Spanish subtitles. For more information, visit: http://www.marathonoil.com/Social_Responsibility/Environmental_Stewardship/Hydraulic_Fracturing/