Parallel coordinates plot (Wegman, 1990) comparing emissions and production parameters for different North American production regions. For each production region, we plot each parameter on a parallel y-axis, with the range of values shown in the plot. The Gini coefficient represents a measure of disproportionality: the closer to one, the greater the influence from a small number of high-emitting sites (Collins et al., 2016; Zavala-Araiza et al., 2017). Proportional loss rate values represent the median loss rate from the emission distribution for each production region. Emissions represent the central EF for each production region. We also plot mean gas production and mean oil production for each production region (for the sampled populations). No oil production was reported for the Marcellus Shale production sites. DOI: https://doi.org/10.1525/elementa.284.f9