The Key of Sustainability-Community cooperation (example of an ecovillage) is an individual EVS, 12-months long project with the goal to learn about sustainable lifestyle and methodologies. The volunteer will work in the ecovillage Ecoaldea El Romero which is part of an ecovillage network in Chile and is situated in the North of Chile, in the 4th region, La Serena, Valle de Elqui. She will help to work in different areas and projects such as learning about and helping in various techniques of sustainable contsruction forms, special gardening which will contribute to the developement of the local area and the community’s infrastructure designing all by permaculture principles. Also contributing to educators who teach both youngsters, adults and other educators about environment friendly practices and methodologies in education of a nonformal way. The volunteer can also support this by teaching language (English) to the children. Another main part of the voluntary work is to participate in great collaborations with other partner organisations and communities of the network (Red de EcoChile-Network of ecovillages in Chile) which will give the volunteer the chance to see differences between ecovillages and be part of successful cooperations. This will bring the opportunity for the volunteer to participate in ’Permasur’ which is an international forum of projects, networks with similar interest and motivations not only from Chile but from other parts of the South, like Argentina. This can foster a deeper understanding of a more international and global collaboration of ecovillages that can help later the volunteer to incorporate both in Hungary and in Europe, not to mention that mutually she can promote European citizenship, values and YiA programs. After the service the voluntary can return home with a greater knowledge and developed competences that she can share with the local communities and also in wider areas.