The per capita GHG emissions were most sensitive to the users' energy excretion (fraction of intake; coefficient of 0.91/0.91), which influences the amount of COD in the waste stream and ultimately how much methane is produced (and released as a fugitive emission). This was followed by the Spearman's rank-order correlation coefficient of AnMBR methane yield/production fraction (0.22/0.22), AnMBR COD removal (0.19/0.19), caloric intake (0.17/0.17), and methane characterization factor (0.17/0.17). All the above parameters important to GHG emissions directly relate to the influent COD and its degradation to methane, as well as the sludge characteristics which correspond to the amount of fuel needed for sludge pasteurization.