The chart below shows the amount of CO2 emissions you will save if you travel by train, instead of a car or plane.
The calculations are based on:
Car = 0.114kg CO2 / pass km. This is derived from the DEFRA CO2 emissions factor for an average petrol car which is 0.180kg CO2 / vehicle km and the average loading for a car: 1.6 people / journey (DfT).
Train = 0.052kg CO2 / pass km. This is derived from the DEFRA CO2 emissions factor