"How does a passenger calculate his CO2 emissions on a flight?" – the climate protection experts at Lufthansa and myclimate went about answering this question. They assessed and evaluated more than 58 000 individual flights in the Lufthansa Group. The entire Lufthansa fleet was analysed, from the small regional jet all the way to the larger long haul aircraft, in order to calculate the overall kerosene consumption during air travel from gate to gate. The calculations included the varying meteorological conditions (winds) and taxiing on the ground, as well as holding patterns and re-routing in the air. This calculation basis was used to determine the average kerosene consumption per passenger for all the routes in the Lufthansa flight schedule. Therefore, an emissions calculator operated by myclimate can directly allocate the corresponding average CO2 emissions for the respective flight; after all, there is a linear relation between kerosene consumption and emissions.
In addition – if desired - the Carbon Calculator takes into account the different seat classes (Economy, Business, First). Therefore the emissions will be weighted depending on the different place and weight of the respective seat, The default configuration is Economy Class.
Besides CO2, air traffic produces other emissions (especially nitrogen oxides and water vapor) to which an impact on climate is attributed. Science is still very unclear as to the extent of this impact. Hence, Lufthansa has been actively supporting climate research for over 20 years in order to obtain more exact findings as to other factors which impact on climate. However, as long as there is still so much uncertainty about the exact effect these non-CO2 air traffic emissions have on climate, Lufthansa will not be taking any other emissions into account in its emissions calculator. However, after the CO2-calculation, each customer has the option to vary his payment by using the input field "Click here to contribute a different amount".