Estimated population of Pennsylvania within 1 kilometer radius of active oil and gas wells.
Estimated population of Pennsylvania within 1 kilometer radius of active oil and gas wells.  This analysis defines active oil and gas wells in Pennsylvania as those that have been drilled but not yet plugged, omitting those where location data was not available.  Census data is from 2010 Census Tracts.  Some residents in other states are within a kilometer of oil and gas wells in Pennsylvania, but these were not included in this analysis.
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