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.
A total of 32 members of Congress last week sent a strongly worded letter to U.S. Secretary of State Hilary Clinton over the inclusion of the anti-fracking film "Gasland" by director Josh Fox in the 2012 American Film Showcase.
They urged Clinton to drop "Gasland" from the showcase because of what they called its errors and misleading statements about hydraulic fracturing or fracking in drilling for natural gas.
The inclusion of the film is further evidence of the "radical environmental agenda" at the State Department, the signees said.
The agency's role in the Keystone XL pipeline is further evidence of that agenda, they said.
Among the signess was one Ohioan: U.S. Rep. Steve Chabot, R-Cincinnati.