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.
Royal Dutch Shell has not yet determined if it will build an ethane cracker plant in Beaver County in western Pennsylvania.
But the energy giant has begun soliciting agreements with drilling companies to provide ethane for processing.
The company will accept offers from drilling companies through Oct. 4.
It reportedly has agreed to terms with at least four drilling companies in the Utica and Marcellus shales: CONSOL, Noble Energy, Seneca Resources and Hilcorp Energy.
Shell began looking at the site on the Ohio River near Monaca in early 2012. That site won out over proposed sites in Ohio and West Virginia.
There are also numerous pipeline projects proposed and under construction to carry ethane to the Gulf Coast for processing.
Click here to read the full story from the Pittsburgh Post-Gazette.