This calculator provides information on the annual quantity of oxides of nitrogen (NOx) and fine particulate matter (PM10) emitted to air by your journeys to and from school during a year.
To calculate how much of each pollutant is emitted to air by your school journeys, we use vehicle emission factors that are based on our current understanding of emissions from vehicles in Scotland.
The factors are used to calculate pollutant emission rates in grams per distance travelled for different vehicle types. The emission rate is then multiplied by the number of journeys to and from school in a year and divided by the number of passengers in the vehicle to calculate an annual emission per person for each pollutant in grams.
The equation for the calculation is:
There are a wide number of variables used when calculating vehicle pollutant emissions so some assumptions have been made for this simplified emissions calculator as follows: