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 new European study find the risks associated with large-scale shale gas development and fracking to be high and in some cases very high.
The study by AEA Technology looks specifically at the cumulative environmental impacts of multiple shale gas wells.
Eight elements of European Union (EU) environmental rules are identified as being ill-equipped to deal with the water, waste, liability, air quality and other issues of large-scale use of hydraulic fracturing.
The report was done for the European Commission DG.
It triggered a call for a ban on fracking because of the risk by Food & Water Watch. Or the European Union should toughen its rules the eco-group said.
Click here to read the 292-page report.