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.
James "Chip" Northrup is gaining a following as an outspoken critic of hydraulic fracturing or fracking.
He lives in Dallas in the winter and in Cooperstown, N.Y., in the summer.
For 20 years, he was a heavy investor in drilling and drilling rigs in Texas.
His blogs are gaining lots of attention, especially in New York where a moratorium against drilling in the Marcellus shale could be lifted.
Artvoice offers a profile on the Northrup. Click here to read the story. There is also information provided on finding Northrup's anti-fracking blogs.