DENVER
11/22/2009 05:12 am ET Updated May 25, 2011

Fracking Proves Dangerous In Pennsylvania Case

ProPublica Monday reported environmental officials were scrambling to clean up 8,000 gallons of a "potential carcinogen" manufactured by Halliburton and used in a natural gas drilling process called hydraulic fracturing that spilled into a creek near Dimock, Pa.

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