shale gas / conventional gas / odorless radioactive gas / natural gas wells / radioactive gas / gas wells / natural gas / water containing proprietary chemicals / conventional natural gas wells / unconventional natural gas wells / /
Organization
University of California / Johns Hopkins University Bloomberg School of Public Health / Bloomberg School / U.S. government / Pennsylvania Department of Environment Protection / Mikenorton/Wikipedia Johns Hopkins Bloomberg School of Public Health / Department of Environmental Health Sciences / /
Person
Sara G. Rasmussen / Joan A. Casey / Jennifer K. Irving / Brian S. Schwartz / Paul A. Locke / Elizabeth L. Ogburn / Jonathan Pollak / /
Increased levels of radon in Pennsylvania homes correspond to onset of fracking