Abandoned oil and gas wells are leaking planet-warming methane. Workers are struggling to keep up...

As an oil worker and well site supervisor, Druis Trahan has seen a lot of abandoned wells. But each one is a little different.

Today's job started simple enough. Unlike with some abandoned wells in the wilderness, this one was easy to haul equipment to — it's just off a road that runs by some ranches in Greenwood, Louisiana, outside Shreveport. But Trahan says they can't yank out the tubing, the steel pipe that runs down 3,900 feet into the earth, which means the job just got more complicated.

Well number 202188 was drilled in 1985, but hasn't produced any oil or gas since 2010. It's been sitting in the middle of this pasture in Greenwood, Louisiana ever since.