This is Volume 1 of the Final Report of the Forty-second Antarctic Treaty Consultative Meeting (ATCM) held in Prague, Czech Republic, 1-11 July 2019. This volume includes Part I (ATCM Final Report, Report of the Committee for Environmental Protection) and Part II. Measures, Decisions and Resolutions adopted in 2019. This edition in written in the English language. There are also editions in English, French and Spanish.