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.
Musicians Natalie Merchant. Joan Osborne, Citizen Cope and Tracy Bonham headlined a star-studded anti-fracking concert on Tuesday in Albany, N.Y.
The event was organized by New Yorkers Against Fracking.
The day-long event included a late afternoon rally on the West Capitol Lawn.
Other musicians who appeared at the evening show included jazz trio Medeski Martina dn Wood, actors Mark Ruffalo and Melissa Leo, singer-songwriter Meshell Ndegeocello and the Felice Brothers.
The rally and concert were to encourage Gov. Andrew Cuomo to continue New York's ban on drilling into the Marcellus shale.