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.
According to Energy in Depth-Ohio, the new Matt Damon movie, Promised Land, is funded in part by the United Arab Emirates.
The movie, scheduled to oppen in late December, has Damon playing a landman trying to lease Pennsylvania farmland for drillers.
The industry is already concerned about the negative image that is likely to emerge from the movie.
Click here to read more from Energy in Depth-Ohio, a pro-drilling industry-backed group.