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.
Casey Junkins of the Wheeling Intelligencer reported on MarkWest Energy and its new cryogenic plant at Cadiz in Harrison County.
The company has invested $2.2 billion in processing plants in the Utica and Marcellus shales.
The Cadiz plant relies on what the company calls turbo expanders to separate natural gas and the liquids.
There is enough ethane in the Utica and Marcellus shales to support several ethane cracker plants, company officials said.
Click here to rad the full story fromJuly 14.