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.
Two Ohio state representatives have introduced legislation to help landowners get proper compensation from leasing mineral rights for drilling.
Reps. John Carney, D-Columbus, and Mark Okey, D-Carrollton, have introduced House Bill 528 that would establish an oil and gas production audit clause to be included in every lease recorded in the state.
The bill is designed to assure that landowners get correct monthly production numbers from drillers.
Most leases contain no audit rights for landowners, forcing them to rely on the honesty of the energy companies, Carney and Okey said.
The bill is expected to be referred to the Agriculture and Natural Resources Committee.