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.
There are five things the United States must do to win at fracking, writes Jeff McMahon at Forbes magazine.
McMahon: "The United States can use fracking as a bridge to a cleaner future, or it can damage land, pollute water, and spew even more greenhouse gases, an energy advisor to two presidents said at the University of Chicago Thursday night.
“'I think as a rule it’s far more expensive to do something stupid and then to clean it up, than to do something right in the first place,' Hal Harvey, CEO of the energy and environmental policy firm Energy Innovation, said at the Harris School of Public Policy."
The Forbes piece is here.