Defunct Pennsylvania oil and gas wells may leak methane and metals into water

PHYSorg
Nov 7, 2025, 6:20 pm483 ptsHotTop
In the dense forests of northwestern Pennsylvania, hundreds of thousands of retired oil and gas wells—some dating back to the mid-1800s, long before modern construction standards—dot the landscape, according to geochemists in Penn State's College of Earth and Mineral Sciences who recently led a study in the…

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