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 business dealings of a member of an Ohio commission that handles complaints involving oil and gas drilling has spurred complaints from environmental advocates and a state ethics inquiry, reports Spencer Hunt of the Columbus Dispatch.
Robert Chase, head of Marietta College's Department of Petroleum Engineering and Geology, represents the public on the five-member commission.
He also works as a consultant for Ohio landowner groups negotiating leases and he gets a percentage of what the companies pay landowners.
Linda Osterman, director of the Oil and Gas Commission, has asked the Ohio Ethics Commission to investigate Chase's business activities and whether they create a conflict of interest.
Chase defended his actions.
Click here to read the Columbus Dispatch story.