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| What They're Saying: Marcellus Shale "An Opportunity to Revolutionize Energy ... NorthcentralPa.com (US House Oversight and Government Reform Committee Remarks, 5/24/11) PSU Geologist, Expert: "Zero Evidence" That Hydrofracturing Has Impacted Groundwater: Dr. Terry Engelder, the Penn State geologist credited with advancing the exploration of the ... See all stories on this topic » |
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