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.
Under pressure from environmentalists and state lawmakers, California Gov. Jerry Brown's administration has agreed to draft regulations on hydraulic fracturing or fracking.
Brown's administration is seeking money in the next state budget to regulate the booming oil industry and to assuage the public's concern over hydraulic fracturing or fracking, the Los Angeles Times reported today.
The state plans to develop rules that ensure the integrity of oil wells and establish reporting requirements for drillers that rely on fracking, the newspaper said.
At present, California does not require companies to disclose where they ue the procedure or what chemicals are used..
Lawmakers have said the rules are long overdue.
California is the fourth largest oil-producing state