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.
The Center for Environmental Health has released a new report outlining the health risks to pregnant women and young children from harmful chemicals used in fracking, reports EcoWatch.
The report, "Toxic and Dirty Secrets: The Truth About Fracking and Your Family's Health," shows how chemicals related to the oil and gas industry when conducting fracking operations can pollute the air and water in communities around fracking sites and pose health risks especially to pregnant women and children, who are most vulnerable to chemical exposures.
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