ACT4LITTER aims at reviewing the most promising proposed measures to effectively tackle the issue of Marine Litter and select those that could be implemented in MPAs, considering particularly the ecosystem services. The selection of measures will result in the development of MPA-specific action plans for implementation in a future project. Those plans will be complemented by a realistic and operational governance plan at transnational level. MPA stakeholders and key experts on marine litter value chain will be involved through the process to validate the outputs together. The action plans will have a strong focus on preventive measures, using circular economy and sustainable consumption and production approaches.