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.
About 65 percent of the American public favors tighter rules on hydraulic fracking or fracking in drilling for natural gas.
More than three times aws many Americans say there should be more regulation of fracking than less, according to a Bloomberg News National Poll conducted March 6-11.
The findings coincide with recent surveys in Ohio and New York where people who believe that fracking will cause environmental damage outnumber those who say the process is safe.
"That actually doesn't surprise me," Mark Boling of Houston-based Southwestern Energy Co., told Bloomberg. "We have been sp focused as an industry on figuring how to crack the code and get these huge volumes of gas trapped in shale formations. We haven't focused on the things we have to do differently above ground."
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