The 2017 activity report looks back at the main activities carried out by Plan Bleu in 2017, such as strengthening the interface between science and policy, the transition to a green and blue economy, the simplified « peer review » mechanism (SIMPEER) of national sustainable development strategies, the animation of three Interreg MED projects (PANACeA, BleuTourMed and InnoblueGrowth), public-private partnerships in protected areas, mediterranean forest management, etc. The main events organized during the year, as well as the reports and documents published, are also presented.