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 Congressional Research Service has issued a new 10-page report looking at hydraulic fracturing or fracking and the federal National Environmental Policy Act.
The 10-page report by attorney Brandon J. Murrill looks at two situations in which agencies argued they did not need to conduct a comprehensive environmental review of fracking under NEPA.
The April 25 report looked at issues involving the U.S. Department of Agriculture Rural Development agency and the Delaware River Basin Commission.
You can access the report here.