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 theory that a U.S. manufacturing renaissance is being fueled by cheap shale energy has broad support, reports National Public Radio.
"The millions of Americans who lost factory jobs over the past decade may find this hard to believe, but U.S. manufacturing is coming back to life.
"The chest compressions are applied by the pumping of cheap, domestic natural gas.
"'We are entering a new era,' says economist Jerry Jasinowski, a former president of the National Association of Manufacturers, a trade group. He and other optimists are cheered by the increase in industrial production, which has grown at a 5 percent annualized rate since the Great Recession ended. That's more than twice as fast as the economy as a whole.
"Some economists are skeptical about just how big, or long-lasting, the impact of cheap gas will be."
Read NPR's full story here.