The U.S. has millions of old gas and oil wells. Here’s what it takes to plug them up

By Camila Domonoske

The U.S. has millions of old gas and oil wells. Here's what it takes to plug them up

There was a circle in Maria Burns’ yard where grass wouldn’t grow and trees died. She knew what it was: An old natural gas well, plugged when she was a little girl, starting to leak again.

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