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.
About 250 Ohioans gathered on the west lawn of the Ohio Statehouse in Columbus today to protest hydraulic fracturing or fracking and to call on Ohio to adopt a moratorium on drilling natural gas production and waste injection wells.
Speakers included nine members of the Ohio General Assembly.
"This protest shows that Ohioans will not sit back while their homes, health, community and environment are threatened," said Teresa Mills, child health coordinator with the Center for Health Environment and Justice.
The protest was organized by No Frack Ohio, a coalition of 50 grass-roots groups.
Here's another report on the rally from Cleveland-based EcoWatch. Click here.