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.
Shell Oil has said it has not yet made a final decision on whether it will build a multi-billion ethane cracker plant in western Pennsylvania.
It is investigating a site in Beaver County northwest of Pittsburgh on the Ohio River.
Shell picked the site over possible sites in Ohio and West Virginia.
Shell CEO Peter Voser has been quoted a ssaying it would be several years before a final decision is made.
That time frame was confirmed by Shell officials in an interview with the Pittsburgh Business News, reports the Marcellus Drilling News.
The plant is projected to have a $10 billion to $20 billion economic impact.
It would take ethane from natural gas drilling and turn it into polyethylene, a key plastic.