Chesapeake Energy Corp,the Oklahoma-based firm is the No. 1 driller in Ohio.
Rig Count Interactive Map by Baker Hughes, an energy services company.
Shale Sheet Fracking, a Youngstown Vindicator blog.
The Ohio Environmental Council, a statewide eco-group based in Columbus.
Earthjustice, a national eco-group.
People's Oil and Gas Collaborative-Ohio, a grass-roots group in Northeast Ohio.
Concerned Citizens of Medina County, a grass-roots group.
No Frack Ohio, a Columbus-based grass-roots group.
Fracking: Gas Drilling's Environmental Threat by ProPublica, an online journalism site.
Pipeline, blog from Pittsburgh Post-Gazette on Marcellus shale drilling.
Allegheny Front, environmental public radio for Western Pennsylvania.
From the Associated Press:
An important study on possible health impacts of natural gas drilling in Pennsylvania is still looking for additional funding.
Geisinger Health System spokeswoman Amanda O'Rourke said Wednesday the $1 million grant that was announced in February 2012 remains the only funding for a project that was projected to cost at least $25 million.
Geisinger plans to look at health histories of hundreds of thousands of patients who live near Marcellus shale gas wells in Pennsylvania. Geisinger is based in Danville.
O'Rourke says small-scale pilot studies on trauma, births, asthma and pulmonary disease are moving forward. But pilot studies don't provide definitive answers to medical questions.
Geisinger says conclusions about whether drilling is safe are likely years away, though the pilot studies will be done sooner.