https://phys.org/news/2018-10-persistent-gap-natural-gas-methane.html

With invaluable assistance from industry partners, the researchers have significantly advanced basin-level emission quantification methods and shed new light on important emissions processes.

"Our study is the first of its kind, in its scope and approach," said Dan Zimmerle, senior author of the PNAS study, and a senior research associate at the CSU Energy Institute. "It utilized concurrent ground and aircraft measurements and on-site operations data, and as a result reduces uncertainties of previous studies."