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.
Time magazine reports that Chesapeake Energy and others in the natural gas industry paid more than $25 million to one of the nation's oldest and most respected environmental groups, the Sierra Club.
The Sierra Club stopped accepting the money in 2010.
An excerpt from the magazine: "TIME has learned that between 2007 and 2010 the Sierra Club accepted over $25 million in donations from the gas industry, mostly from Aubrey McClendon, CEO of Chesapeake Energy—one of the biggest gas drilling companies in the U.S. and a firm heavily involved in fracking—to help fund the Club’s Beyond Coal campaign. Though the group ended its relationship with Chesapeake in 2010—and the Club says it turned its back on an additional $30 million in promised donations—the news raises concerns about influence industry may have had on the Sierra Club’s independence and its support of natural gas in the past."
Read the story here.