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.
Too much success is becoming a problem for Marcellus shale drillers, says the Pittsburgh Tribune-Review.
Shale formations such as the Marcellus are producing so much natural gas that the nation's gas supply will exceed its demand by 2017, according to research released on Tuesday by Bentek Energy LLC.
The consultant said its models show production in Pennsylvania and Ohio will be eight times larger than the growth in demand during the next 10 years.
“We've had to pull back on some very profitable plays that just a few years ago were supposed to have tremendous growth,” said Justin Carlson, a Bentek analyst and Tuesday's keynote speaker at the 2013 Penn State Natural Gas Utilization Conference. “It is a substantial opportunity for end-users.”
Click here to read the full story by reporter Timothy Puko.