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.
From the Ohio Oil & Gas Association:
U.S. Sen. Rob Portman,R-Ohio, the Ohio Oil & Gas Association and the Youngstown/Warren Regional Chamber are hosting an Energy Jobs Fair on April 29.
The event will be held from 9 a.m. to 3 p.m. at the Holiday Inn Boardman at 7410 South Avenue, Youngstown.