The UN International Civil Aviation Organisation ( ICAO ) has put its hopes on a cap and trade system for international flights to cut emissions . It has proposed an offsetting scheme which would run a voluntary second phase from 2021 to 2023 , a voluntary first phase with a fixed cap on offset emissions from 2024 to 2026 , and a mandatory second phase from 2027 to 2035 . The scheme ’s viability will be discussed at the next assembly of the ICAO from 27 September to 7 October . The industry is expected to grow at an average rate of around 5% per year over the next two decades. The organisation will decide how emissions will be assigned , either individually ( per airline company ) or sectorally ( per member state ) .
The UN International Civil Aviation Organisation ( ICAO ) has put its hopes on a cap and trade system for international flights to cut emissions . It has proposed an offsetting scheme which would run a voluntary second phase from 2021 to 2023 , a voluntary first phase with a fixed cap on offset emissions from 2024 to 2026 , and a mandatory second phase from 2027 to 2035 . The scheme ’s viability will be discussed at the next assembly of the ICAO from 27 September to 7 October . The organisation will decide how emissions will be assigned , either individually ( per airline company ) or sectorally ( per member state ) .