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.
On Dec. 7, Time magazine named "My Water's On Fire Tonight (The Fracking Song)" one of its Top 10 most-creative videos of 2011.
The 2-minute, 33-second video was creative by a team of New York University students at Studio 20 NYU.
The animators and musicians did a pretty good job in explaining the issues surrounding fracking or hydraulic fracturing in a light-hearted way.
But the Black Keys won't have to worry about musical competition.
The video may not change your mind, but it is bright and breezy.