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.
1. The new Socialist French government is considering lifting the country's ban on hydraulic fracturing of fracking.
2. Los Angeles-based OriginOil Inc. is using its algae system to treat fracking flowback water.
The company also uses its algae to produce and market crude oil.
3. The Columbiana Port Authority in eastern Ohio has agreed to sell water to Aqua Terra Asset Management.
That company will then sell the water to drillers in the Utica and Marcellus shales for hydraulic fracturing or fracking.
The company will get its water from two fire hydrants in East Liverpool and will pay $9 per 1,000 gallons, according to the Marcellus Drilling News.
4. Chevron has restarted production in northern West Virginia.
That includes wells in Marshall and Ohio counties.
The company had halted its West Virginia operations after an explosion earlier this year near Moundsville.
That safety review is continuing, but it's been completed in some areas.