Whether and to what extent natural gas is better than coal or oil with respect to climate impact depends on how much of it escapes into the atmosphere during extraction and transport. Unfortunately, little is known about “fugitive” methane emission rates. With this gap in mind, the Environmental Defense Fund (EDF), partnering with about 90 industry and academic partners, has launched 16 studies that aim to increase our understanding of methane emission rates from key elements of the natural gas system. This grant provides supplemental support for this series of studies, enabling EDF to compare and contrast the relative accuracy of a wide range of methodologies used to quantify methane emissions, and to assess existing and emerging methane monitoring technologies. Their findings, to be published in a final report, will aim to provide an impartial, evidence-based evaluation of the most promising technologies and methodologies for measuring fugitive methane emissions, identify additional research that is needed, and chart a path towards the commercialization and large-scale deployment of well pad methane monitoring systems.