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 new study says that a booming gas and oil sector was responsible for 9 percent of new jobs created in the United States in 2011.
The joint study was conducted by the World Economic Forum and IHS CERA, a global business information company.
The study says the gas-oil industry created 37,000 jobs in 2011 and that triggered an additional 111,000 indirect jobs in that time.
"We always suspected that energy had a vital role to play in economic recovery, but we were still surprised when the data uncovered the magnitude of the sector's multiplier effects," said Roberto Bocca of the World Economic Forum.'