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.
Karen Boman at Rigzone offers another take on comments by a top Chevron Gas executive on the future of shale energy.
Boman writes: "The U.S. Energy Information Administration's forecast of a global 'golden age' of gas can only be realized if sufficient natural gas supplies can be brought to market, a Chevron official told attendees at the IHS CERAWeek conference Wednesday in Houston.
"Natural gas has become a hot topic not only in the United States but worldwide as countries seek ways to meet future energy demand while reducing carbon dioxide emissions, said Joseph Geagea, president of Chevron Gas and Midstream.
"Much of this gas demand is expected to occur in Asia, Geagea noted, and with limited indigenous gas supply in some Asian countries and pipeline capacity to bring in supply. Geagea has seen no evidence that future demand will lighten."
Read the full Rigzone story here.