Plastic pollution is a pressing global issue, particularly in rivers, recognized as primary pathways for plastic transport to oceans. Research efforts have focused on spatial and temporal analyses, using diverse methodologies from laboratory experiments to field studies, and modeling approaches which have improved understanding on plastic transport processes (sources and sinks) to inform mitigation strategies.  Research efforts have also been focused on the chemicals associated with plastics like 6PPD-Q, UV filters, Bisphenol A, etc. This session therefore invites contributions from laboratory experiments, field studies, and modeling approaches encompassing all plastic sizes (nano, micro, and macro) and plastic associated chemicals. Topics of interest include: *Sources and transport processes. *Transport processes across domains (rivers, land, and oceans). *The use of innovative technologies to detect plastics and plastic additives across environments. *The impact of environmental conditions on plastic pollution. *This session will also hold discussions on grand challenges and solutions in plastic research.

• SY - Science and Society