The personal air pollution footprint calculator is an educational tool designed to give you an estimate of your annual emissions of NOX and PM10 on personal transport use. You can also estimate whether your domestic gas and electricity usage is above or below average. Domestic energy use and transport are the most significant sources of NOX and PM10 in Greater Manchester. Currently, road transport contributes to approximately 60% of the total emissions of NOX and 54% of the total emissions of PM10 in Greater Manchester. Combustion of fuels contributes to 21% of the total emissions of NOX and 16% of the total emissions of PM10 in Greater Manchester.