When calculating stationary combustion emissions, such as those from Natural Gas use, there is a selection for “Activity Area”. What does that mean?
Activity Areas help select the CH4 and N2O emissions factors. While CO2 Emissions Factors are generally directly related to the quantity and carbon content of the fuel burned, CH4 and N2O emissions vary with the technology used to burn the fuel. The default CH4 and N2O coefficients in the application for stationary combustion are average emissions factors for each fuel based on the technologies commonly used in each activity area. The Energy Industry CH4 value may be lower than the Residential value, because the average power plant is much more efficient and has more controls on it than the average home furnace. Different data sources use different activity areas, so you may encounter that in the application the software just shows whichever activity areas were in the source data.
