More from the article ...

... Methane escapes from both natural gas wells and underground coal mines, even those that have been long out of service. The estimates come from Kayrros, a global assets observation platform that monitors and measures energy and natural resource activity worldwide using advanced mathematics and data gathered by satellites.

Worrisome as they are, the findings may actually understate Appalachia's role in methane emissions as they pre-date a November 2022 "super-emitting" event in Cambria County, Pennsylvania, when a natural gas storage well was discovered to be gushing methane into the environment.

The Pennsylvania Department of Environmental Protection estimated that the site allowed a staggering 1.29 billion cubic feet of gas, equivalent to roughly 20,000 metric tons of methane, to escape into the air. The single leak effectively erased emissions gains from about half of the 656,000 electric vehicles sold in the US last year. ...