Abundant, inexpensive, and lower in emissions than traditional coal power sources, natural gas is expected to play an enormous role in our energy future. Although the drilling technique of hydraulic fracturing or "fracking" has made it possible to extract natural gas from "plays," such as the Marcellus Shale Play, some members of the public have become increasingly concerned about problems alleged to be associated with fracking and drilling, such as groundwater contamination and air pollution.