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.
Texas-based Range Resources intends to focus its drilling efforts in 2012 in Pennsylvania and Ohio shale where lucrative natural gas liquids and oil reserves are found.
Other companies, including Chesapeake Energy Corp., have announced similar plans, as natural gas prices remain low.
But Range Resources, based in Fort Worth, has a new name for the area with its so-called wet gases: the "super-rich area," reports the Pipeline blog from the Pittsburgh Post-Gazette.
Range reportedly has leases on 125,000 acres in western Pennsylvania and eastern Ohio in the super-rich area, it reported.
The company is earmarking 75 percent of its 2012 drilling funds for the liquid-rich areas of Marcellus shale, as well as drilling in Mississippi. The other 25 percent will focus on natural gas areas in northeast Pennsylvania.