Note that only a few countries may have sludge removal data and CH4 recovery data. The default for sludge
removal is zero. The default for CH4 recovery is zero. If a country selects to report CH4 recovery, it is good
practice to distinguish between flaring and CH4 recovery for energy generation, which should be reported in the
Energy Sector taking into account the avoidance of double counting emissions from flaring and energy used.