This is Volume 1 of the Final Report of the Forty-third Antarctic Treaty Consultative Meeting (ATCM) held in Paris, France, 14-24 July 2021. This volume includes Part I (ATCM Final Report, Report of the Committee for Environmental Protection) and Part II. Measures, Decisions and Resolutions adopted in 2021. This edition in written in the English language. There are also editions in French, Russian and Spanish.