The Ligue 22, the twin committee of Aue and the Social Center in Kadan would like to accompany their youth in their work of discussing the intercultural dialogue methods, and they will have a look at the differents meaning of Environment and sustainability in differents countries. We will question ourselves about how to be stronger to protect and share our planet : What is sustanability in each countries? How the countries act for the protection of the nature? How could we cooperate inside the European Union? How young people could act for ecology? What are the means setting up to act in a local scale? It is about understanding of different kind of processes and operations, and not to distinguish one country from another. The most important is that participants can expresse themselves (what is substainable development? How does it work in their country?) The mains objectives are : -to sensibilize participants to European History -to discover the richness of spoken languages in countries taking part in the project -to promote the awareness of Europe, by valorizing culturals identities, and to reinforce solidarities through the realisaton of a common project -to mobilize youth on europeans projects with a cultural and civic dimension. -to talk about environmental substainability - to offer the possibility to young people from differents countries and differents social backgrounds to gather. - to show to the local inhabitants the diversity of europeans - to reinforce the network of local, european Partner involved in the growing of social and cultural mixity as european ambition