October 15 -17, 2025 (Madrid, Spain) The Summit is the flagship gathering of MARII, bringing together scientists from around the world to share cutting-edge research and foster new collaborations to advance microplastics science.

Dr. Todd Gouin explores whether risk assessment is the best approach for microplastics. Rachel Zajac-Fay discusses threshold development and ongoing work evaluating microplastics toxicity data

Dr Richard Cross and Dr Andy Booth explore the fate and effects of microplastics in soils as well as the role of chemical additives in plastic materials in the degradation process of plastics.

Dr. Raymond Pieters examines how micro- and nanoplastics interact with the immune system, while Dr. Luke Parker discusses the development of reliable test materials for studying these particles.

This webinar highlights MARII’s work on standardizing methods to assess human exposure to nano- and microplastics and their potential health impacts, featuring two presentations advancing research in the field.

This webinar explores modelling efforts to support environmental risk assessment of microplastics. Prof. Matthew MacLeod and Dr. Antonia Praetorius present innovative frameworks to understand microplastics behavior, transport, and fate in the environment.

This webinar covers ICCA’s global effort, known as MARII, to advance microplastics research through systematic, hypothesis-driven studies, and bringing together scientists from industry, academia, and government to share knowledge, research, and innovations on microplastics.

The two-day MARII workshop in Seattle convened approximately 60 researchers from around the globe. The workshop discussed progress in the field of microplastics risk assessment and provided participants the opportunity to present their latest research. View a summary and presentations from the workshop.