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 Associated Press on Wednesday reported that the price of natural gas had fallen to its lowest level in more than a decade, a remarkable decline for a commodity that not long ago was believed to be in short supply.
The country's gas supply is growing so fast that analysts worry that underground storage facilities could be full by fall and lead to further price declines.
On Wedneday, the futrure price fell to $1.984 per 1,000 cubic feet of natural gas, the lowest price since Jan. 28, 2002, when the price hit $1.91.
If the price slides to $1.75, it would be the lowest since March 23, 1999.