As we pay close attention to the debate over hydrofracking this morning – and all week — on WAMC, we now turn to an interview between our Alan Chartock and Dennis Holbrook, executive vice president and chief legal officer of Norse Energy Corporation. Holbrook has spent nearly four decades in the energy industry and has served as a director of the Independent Oil and Gas Association for the past 25 years. Holbrook describes the chemical mix used in the fracking process.