Thomas Maes (GRID-Arendal) talks about size classification of marine litter. Then, Richard Dacosta (GRID-Arendal) discusses regional and international responses to marine litter. This video is part of the online course “Marine Litter Monitoring for Citizen Science”, developed by GRID-Arendal and Sustainable Seas Trust. The course is based on SST’s African Marine Litter Monitoring Manual 2022…