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The atmosfair carbon emission calculator provides two estimates for the flight emission: one value which corresponds to the estimate of the fuel burnt and one value which provides the other part of the climate impact (contrails, ozone formation and other effects). This plots shows the ratio between the latter and the former. A multiplier coefficient of 3 is applied for all emissions above 9 km, which translates to a multiplication factor of 2.95 for long distance flights
