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'Fracking' in the dark: Biological fallout of shale-gas production still largely unknown
Date:7/31/2014

able information on spills, wastewater disposal and the composition of fracturing fluids. Of the 24 American states with active shale-gas reservoirs, only five Pennsylvania, Colorado, New Mexico, Wyoming and Texas maintain public records of spills and accidents, the researchers report.

"The Pennsylvania Department of Environmental Protection's website is one of the best sources of publicly available information on shale-gas spills and accidents in the nation. Even so, gas companies failed to report more than one-third of spills in the last year," said first author Sara Souther, a postdoctoral research associate at the University of Wisconsin-Madison.

"How many more unreported spills occurred, but were not detected during well inspections?" Souther asked. "We need accurate data on the release of fracturing chemicals into the environment before we can understand impacts to plants and animals."

One of the greatest threats to animal and plant life identified in the study is the impact of rapid and widespread shale development, which has disproportionately affected rural and natural areas. A single gas well results in the clearance of 3.7 to 7.6 acres (1.5 to 3.1 hectares) of vegetation, and each well contributes to a collective mass of air, water, noise and light pollution that has or can interfere with wild animal health, habitats and reproduction, the researchers report.

"If you look down on a heavily 'fracked' landscape, you see a web of well pads, access roads and pipelines that create islands out of what was, in some cases, contiguous habitat," Souther said. "What are the combined effects of numerous wells and their supporting infrastructure on wide-ranging or sensitive species, like the pronghorn antelope or the hellbender salamander?"

The chemical makeup of fracturing fluid and wastewater is often unknown. The authors reviewed chemical-disclosure statements for 150 wells in three of the top gas-producing states
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Contact: Morgan Kelly
mgnkelly@princeton.edu
609-258-5729
Princeton University
Source:Eurekalert  

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'Fracking' in the dark: Biological fallout of shale-gas production still largely unknown
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