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 the Columbus Dispatch, Gov. John Kasich is looking at imposing an "impact fee" of natural gas-oil drillers in Ohio.
Such a fee would cover the cost of damage to local infrastructure and would be part of a package of taxes and fees that Kasich will unveil soon, the paper reported today.
Kasich told the Dispatch that he has discussed his proposal with industry leaders.
The amount of the fee reportedly has not yet been determined.
Here is the story by reporters Dan Gearino and Joe Vardon.