The aviation industry has committed to carbon-neutral growth post-2020. CORSIA is a market-based mechanism, which starts in January 2021. It is voluntary for countries to participate in the scheme during the pilot and first phase.
However, it is mandatory for airlines to offset their emissions from flights between states that are participating in the scheme starting in 2021. The scheme will be mandatory for all countries by 2027.
CORSIA is being instituted to achieve ICAO’s goal of “carbon-neutral growth” for the global airline industry from 2020 forward.