Coexistence of CH4, CO2, and H2O in exoplanet atmospheres P. Woitke, O. Herbort, Ch. Helling, E. Stüeken, M. Dominik, P. Barth and D. Samra A&A, 646 (2021) A43 Published online: 05 February 2021 DOI: 10.1051/0004-6361/202038870