Scientists in Pennsylvania say they've found a clear link between natural gas drilling in the Marcellus Shale region and local groundwater contamination.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/fracking-chemicals-detected-drinking-water-supplies-near-pennsylvania-homes-marcellus-shale
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/international-business-times
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-supply
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/petrochemical-industry
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us