The Environmental Protection Agency reports that 477,606 pneumatic (gas actuated) devices are in use at natural gas production sites throughout the U.S. (sciencedaily.com)
This work presents direct measurements of methane emissions from multiple sources at onshore natural gas production sites incorporating operational practices that have been adopted or become more prevalent since the 1990s. (pnas.org)
Estimates show that natural gas production sites leak from 1 percent to 10 percent or more of their methane. (wri.org)