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 Christian Science Monitor looks at whether the United States should export natural gas to solve the issue of a long-term glut of the fuel.
The CSM writes: "As far as the natural gas industry is concerned, a shift to exporting is a no-brainer. However, this is easier said than done. Before the shale gas boom and the fracking revolution, the US thought it was destined to be a natural gas importer; as such, it does not have the necessary export terminal infrastructure."
Read the whole thing here.