There are currently 15 major operational monitoring programmes, in different geographical ranges, linked to three types of activity: marine litter action coordination, data collection frameworks, and large-scale data repository and portal initiatives (Maes et al. 2019). To date the data and information being collected remain largely unconnected and fragmented, but efforts are under way to standardize and harmonize collection, analysis and reporting methods (Maximenko et al. 2019; Michida et al. 2019).
From collection: From Pollution to Solution: A Global Assessment of Marine Litter and Plastic Pollution