We calculate how many trees need to be planted to offset the carbon emissions of your flights. For the CO2 calculation, we use a formula defined by ICAO (International Civil Aviation Organization, which determines the carbon emissions per passenger as accurately as possible. To be transparent on this, here is the math we do:
CO2 per passenger = 3.16* (total fuel * pax-to-freight factor)/(number of y-seats *pax load factor)
Using the formula above, an economy flight from Hamburg to Frankfurt releases 90kg of CO2 per person. All variables in the equation are based on empirical data collected and calculated by ICAO.
Seven trees can capture 1000kg of CO2 in 20 years. Therefore just one tree would be needed to be to remove the carbon dioxide emissions. Within our project, planting seven trees cost ca. 23,50€. In this specific case, our recommended offsetting amount would be 1,81 Euros.