DAVID GREENE, HOST:
OK. The word fracking was added to the Merriam-Webster dictionary this month. It is defined as the injection of fluid into shale beds at high pressure in order to free up petroleum resources. Despite getting this official definition, both the spelling and meaning of fracking remain controversial. Marie Cusick, from member station WITF, reports.
MARIE CUSICK, BYLINE: This is a fracking site in northeastern Pennsylvania. It's one of the most productive parts of Marcellus Shale natural gas formation.