The Intersessional Workshop on Pollution 2025 cumulative effects and multiple stressors was recommended at the 2019 Scientific Committee meeting (SC68A) and reiterated at SC68B and SC68C. The workshop will cover four main areas: 1) A framework for integrating data 2) New Methods/Methodological approaches for assessing cumulative effects 3) Case studies/research programmes 4) Modelling the population consequences of exposure to multiple stressors The workshop report and any recommendations will be presented at the IWC scientific Committee meeting SC/68D To register for this workshop: https://iwc.zoom.us/meeting/register/tZIqc-uupj4jG9KoqXdhjJld6PGQ_2VP8jq