14 April 2018, Varna, Bulgaria - Children collect and categorize litter on the beach of Kamchia. Marine litter is a complex and transboundary environmental problem, with increasing concern worldwide. Today is evident that effective policy and reduction measures should be urgently put in place, not only on local/national level, but also in regional/sub-regional. Transnational cooperation among countries is a real challenge for marine litter. The overall objective of the MELTEMI project is to enhance the legal framework and increase the capacity of public authorities, stakeholders and society at large on mitigating marine litter pollution. Along with the assessment of marine litter in beaches and sea, the project foresees an active engagement of the society and the key-players; will be achieved by informing, 'educating' training and networking them on a science and policy assessment framework of marine litter.