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.
A story in the Star-Telegram newspaper in Texas reports on a significant University of Texas study saying the Barnett shale will produce natural gas for decades.
Jim Fuquay at the Star-Telegram writes in part: "The Barnett Shale will still be churning out natural gas even in 2050 and will produce more than three times what it has already yielded, according to a new study by the University of Texas at Austin.
"There could be another 10,000 to 11,000 wells drilled in the big North Texas natural gas field, the study by UT's Bureau of Economic Geology forecasts. That activity could concentrate in Tarrant, Johnson, Denton and Wise counties, which have proved to be the most productive areas.
"The Barnett Shale has already produced about 13 trillion cubic feet of natural gas from more than 18,000 wells, according to the Texas Railroad Commission.
"The UT study projects that the field will produce 44 trillion cubic feet by 2050. That's roughly two years of current U.S. consumption.
The whole story is here.