Marine plastic pollution. Main sub-problems include: (1) Identifying Marine Plastic Currents and Accumulation Zones; (2) Reducing Plastic at Its Source; (3) Recycling End-of-Life Marine Plastics.

CO>SEA_P proposes a participatory and transformative CS research, led by a transectoral and transdisciplinary team (geographers, planners, videomakers, marine science scholars and marine professionals), that engages seaworkers, seagoing people and locals citizen in data collection, mapping, and analysis of marine plastic currents and accumulation zones (via offshore expeditions with multibean and scan sonar systems, our micro-plastic trawling DIY devices, diving, social mapping, interviews and field note, off and underwater video documentation), to feed a participatory planning for circularity with local institutions aimed at reducing and recycling plastic waste in the local fishing activity (via charrette, technical table with experts and stakeholders and outreach activities for awareness raising) in the Gulf of Anzio (Rome, Italy). We aim to following-up the citizen science investigation on marine plastic pollution and the participatory planning for marine waste reduction and recycling in the coastal city of Anzio (Rome, Italy). Specific objectives build upon previous projects' results and citizens’ requests to: (1) consolidate and expanding our radically Participatory CS methods in research and documentation of marine plastic floating currents and accumulation zones (via collective offshore expeditions for micro-plastic sampling and analysis, multibean and scan sonar systems, underwater diving exploration, interviews and field-notes for geo-semantic analysis, social-mapping, video-photographic reportages); (2) create a subsequent circular community planning process for preventing plastic pollution (mainly from polystyrene fishing boxes) by adopting FAO-approved reusable boxes; and setting up the local circular resource chain for recycling marine plastic debris from fishing (via collective management plan design, charrette, video and photo expositions, media coverage, follow-up plan).