The International Society for Environmental Biogeochemistry Meeting for 2025 is taking place in Trinity College Dublin on 26-31 October 2025. These are the themes: 1. Microbial Processes in Biogeochemical Cycles Microbial drivers of nutrient cycling play a crucial role at biogeochemical interfaces, where microbial processes and microbe-mineral interactions regulate the transformation and mobility of essential elements in the environment 2. Geomicrobiology Across Environments Geomicrobiology in extreme environments provides insights into the unique adaptations of microorganisms, with terrestrial geomicrobiology focusing on subsurface and soil ecosystems, while marine geomicrobiology and biogeochemistry explore microbial processes influencing ocean chemistry and nutrient cycling 3. Microbial Responses to Anthropogenic and Climate Pressures Climate change, microbial communities, and biogeochemical feedbacks are intricately linked, as anthropogenic impacts on microbial biogeochemical processes can alter ecosystem stability, while bioremediation and environmental restoration strategies help mitigate pollution and recover critical metals in the environment 4. Innovative Approaches in Biogeochemistry and Geomicrobiology Emerging technologies in biogeochemistry and geomicrobiology, combined with biogeochemical modeling and novel computational approaches, are revolutionizing our understanding of microbial processes and their impact on global elemental cycles 5. Historical and Paleo Perspectives in Microbial Biogeochemistry Studying paleo-microbial environments and biomarkers from past to present provides critical insights into ancient microbial life, environmental conditions, and the long-term evolution of biogeochemical cycles And these are the keynote speakers: Karim Benzerara<https://impmc.sorbonne-universite.fr/en/research_teams/biomin-biomineralogy/list-of-members/karim-benzerara.html>, CNRS, France Liane Benning<https://www.gfz.de/staff/liane.g.benning>, GFZ Helmholz Zentrum fur Geoforschung, Germany Eva Stueeken<https://www.st-andrews.ac.uk/earth-sciences/people/ees4/>, St Andrews University, UK Vern Phoenix<https://www.strath.ac.uk/staff/phoenixvernondr/>, University of Strathclyde, UK For further information and to register, visit www.iseb-2025.org<http://www.iseb-2025.org>. The Abstract submission deadline has been extended to 31st August.