Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA)


​What is CORSIA?
CORSIA is the first global market-based measure for any sector and represents a cooperative approach that moves away from a “patchwork” of national or regional regulatory initiatives. It offers a harmonized way to reduce emissions from international aviation, minimizing market distortion, while respecting the special circumstances and respective capabilities of ICAO Member States.
CORSIA complements the other elements of the basket of measures by offsetting the amount of CO2 emissions that cannot be reduced through the use of technological improvements, operational improvements, and sustainable aviation fuels with emissions units from the carbon market.
Who Participates in CORSIA?
CORSIA is implemented in three phases: a pilot phase (2021-2023), a first phase (2024-2026), and a second phase (2027-2035). For the first two phases (2021-2026), participation is voluntary. From 2027 onwards, participation will be determined based on 2018 RTK data. 
As of 1 January 2022, 107 had announced their intention to participate in CORSIA (click here for a list of 2022 volunteer States, as approved by the ICAO Council). 8 more States (Cambodia, Cuba, Federated States of Micronesia, Iraq, Maldives, Saint Vincent and the Grenadines, Timor-Leste, and Zimbabwe), announced their intention to participate in CORSIA from 1 January 2023, bringing the total number of participating States to 115 (click here for the latest list of 2023 volunteer States, as approved by the ICAO Council). 

    Status of CORSIA Implementation

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