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.
Environmentally friendly investors with $1 trillion in assets like what they see in the International Energy Agency's "Golden Rules for a Golden Age of Gas" in a report released on Tuesday.
The report, part of the World Energy Outlook series, outlines a number of recommendationson drilling that the investors' group had outlined earlier.
On May 16, Boston Common Asset Management, the Investor Environmental Health Network and the Interfaith Center on Corporate Responsibility announced that 55 major investment organizations and institutional investors had united in support ofadopting best available practices for the hydraulic fracturing or fracking of shale gas.
The group says it is pushing action from the industry due to the increasing level of uncertainty about fracking.
The proposed guidelines are available at www.iehn.org/documents/frackingguidance.pdf.