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 Ohio Energy Resource Alliance has posted a new video to explain hydraulic fracturing or fracking.
The alliance is comprised of the Ohio Petroleum Council (a division of the American Petroleum Institute), the Ohio Oil & Gas Association, the Ohio Oil & Gas Energy Education Program, Energy in Depth-Ohio and the Buckeye Energy Forum.l
Here's the 3 minute, 32 second video explainer: