2026. THE DYNAMICS OF CO2 AND CH4 EMISSIONS AND ABSORPTION BY LAND AND OCEAN SURFACES IN THE 21st CENTURY: CURRENT ESTIMATES AND TRENDS. Proceedings of the YSU C: Geological and Geographical Sciences. Special Issue N1 (270) (Sep. 2026), 4. DOI:https://doi.org/10.46991/PYSUC.2026.SI1.004.