Gas Drilling Production Waste

February 17, 2012 - 5:25 PM
The Pittsburgh skyline rises above the waters of the Ohio River, which starts at the confluence of the Monongahela and Allegheny Rivers in Pittsburgh on Friday, Feb. 17, 2012. Pennsylvania's Marcellus Shale gas drilling companies are now recycling more and more of their wastewater, in most cases complying with a request from state officials to keep the pollutants from being discharged into rivers that supply drinking water like these. However, despite the dramatic progress on the wastewater recycling, there haven't been equally clear declines in river bromide levels. (AP Photo/Keith Srakocic)