<span style="font-style: italic">A landmark federal study found no evidence that hydraulic fracturing — better known as fracking — contaminated drinking water in western Pennsylvania, the Energy Department told The Associated Press.
The National Energy Technology Laboratory in Pittsburgh monitored wells for a year by injecting special tracers into fracking fluid to see whether any chemicals migrated up towards drinking water. Researchers found that the fracking fluid stayed nearly a mile below drinking water supplies.
“This is good news,” said Duke University scientist Rob Jackson, but warned that a single study does not prove fracking can’t ever pollute since industry drilling practices vary widely throughout Pennsylvania and the country. </span>
Read more: http://dailycaller.com/2013/07/19/energy.../#ixzz2ZamOS96F