Aviation CORSIA: IATA to continue discussions on India joining initiative during voluntary stage Updated : December 25, 2018 05:45 PM IST The Carbon Offsetting and Reporting Scheme for International Aviation (CORSIA) was agreed upon by various countries in 2016. The scheme -- which will be implemented in five phases from 2021 to 2035 -- seeks to reduce emission in the aviation sector by way of carbon offsetting mechanism. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.