The role of stakeholders in managing polythene and plastic waste in coastal cities of Sri Lanka: a case study of the Dehiwala-Mt. lavinia municipal council regionSuresh Kariyawasam, Ayesha Madhuwanthi and Clevo WilsonE3S Web Conf., 96 (2019) 02003DOI: https://doi.org/10.1051/e3sconf/20199602003