Across the Marcellus Shale, most abandoned oil and gas wells are supposedly harmless. But some are leaking - polluting land, water and air - and now there are concerns about other risks, reports Dimiter Kenarov
… area. The rest are just left alone, spewing methane, a greenhouse gas a hundred times more … to climate change as they’re pouring a lot of methane into the atmosphere. We try to raise …