A growing body of work using varying analytical approaches is yielding estimates of methane emissions from the natural gas supply chain. For shorthand, the resulting emission estimates can be broadly described as top-down or bottom-up. Top-down estimates are determined from measured atmospheric methane enhancements at regional or larger scales.
The Camden Gas Project, operated by AGL Upstream Investments Pty Limited (AGL), is a coal seam gas (CSG) project located to the south of Camden, NSW. The project currently comprises the Rosalind Park Gas Plant (RPGP), 144 coal seam gas wells, and interconnecting gas gathering lines.
Limited direct measurements of criteria pollutants emissions and precursors, as well as natural gas constituents, from Marcellus shale gas development activities contribute to uncertainty about their atmospheric impact.