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.
Germany may embrace fracking after all, writes The Washington Post.
The Post writes: "Germany has one of the most robust green movements in the world, but economic pressures are tempting it to try something that critics say would harm the Earth: shale gas drilling.
"Motivated by a rapid-fire increase in natural gas production in the United States, business leaders and some politicians in Germany say they need to act quickly to prevent the country’s industrial core from departing for places where energy costs just a fraction of the price. They worry that the country’s ambitious environmental goals are far less meaningful if the economy withers in achieving them."
The full story is here.