The PlastOPol system for marine litter monitoring by citizen scientists. - Di Wu 035; Jincheng Liu; Manuel Alberto Cordova Neira; Christina Carrozzo Hellevik; Jakob Bonnevie Cyvin; Allan Pinto; Ibrahim A. Hameed; Hélio Pedrini; Ricardo da Silva Torres; Annik Magerholm Fet (Environ. Model. Softw., 2023)