To estimate greenhouse gas emissions, and in particular CO2, we calculate the distance between the two airports, and deduce the amount of kerosene needed.
Then, we add a fixed quantity of kerosene to take into account takeoff and landing.
This mass of fuel oil is multiplied by a fixed factor (from 3.1) to estimate the amount of CO2 emitted
Then, this quantity is distributed over the average number of passengers per flight, depending on the weight corresponding to the planes's class. To infer everyone's share.
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Take, for example, a short flight of around 1 000 kms - which will last about 2 hours. First of all, a fixed factor of about 95 kms must be added to this distance to take into account evasive actions and tactical manoeuvres upon approach. To complete this flight, the aircraft will consume 2.7 kg of fuel oil per km, or about 2.95 tons of kerosene for the trip itself, to which 1.1 tons for take-off and landing must be added, as well as for taxiing between runways and terminals. This gives us a total of 4.05 tons. This consumption of fuel oil produces CO2 - up to 3.1 kg for each kg of fuel consumed. Therefore, in our example, the aircraft will produce a carbon footprint of 12 tonnes of CO2 , of which 75% is produced on the route itself and 25% for the landing and take-off phases (or LTO).