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.
The U.S. Interior Department on Friday outlined new federal proposed rules on fracking.
They call for after-the-fact disclose of chemicals used in fracking or hydraulic fracturing for natural gas.
The initial proposal had called for a more timely release of that information, but was fought by industry lobbtists.
The final proposal covers drilling on 700 million acres of Bureau of Land Management lands plus 56 million acres of Indian lands.
Most of the 13,000 wells that are annually drilled and fracked in the United States are on private lands and not affected by the federal rules. They will primarily fall under state jutrisdiction.