Partnership Building Activity (PBA) “Youth participation for sustainable local democracies” The activity report describes the main outcomes and results of the Partnership Building Activity (PBA) “Youth Participation for sustainable local democracies” in Mollina, Spain, within the framework of the University on Youth and Development. The activity aimed to create a space to exchange different realities, promote good practices, methodologies and tools and develop cooperation projects that link young people, environmental policies and local democracies. The PBA gathered 30 representatives of civil society organisations and municipalities who work on the topic of youth participation in decision-making at the local level from Latvia, Italy, Greece, Turkey, Spain, Romania, Denmark, Netherlands, Serbia, Poland, Armenia, North Macedonia and Portugal.