http://www.nytimes.com/gwire/2011/05/27/27greenwire-could-smog-shroud-the-marcellus-shales-natural-3397.html By GABRIEL NELSON of Greenwire Published: May 27, 2011 Since returning to private life, John Hanger, the former secretary of the Pennsylvania Department of Environmental Protection, has kept busy trying to douse fears that his state’s natural gas boom is contaminating drinking water. Hanger’s two-year tenure saw the Marcellus Shale, an underground rock formation… Read more