FUDEBIOL is a non-profit project aimed to preserve the source of potable water for the region of PérezZeledón in the South Pacific of Costa Rica. The Cultural Association for the Cultural Interchange of CostaRica have been managing this project since its foundation in 1989 and AFAIJ is coordinating the projectfor what is referred to the EVS. It was born with the aim of protecting the river Quebradas and to preservethe rainforest of the mountain. This project is situated on the mountain, 3 kilometres far from Quebradas,between 100 and 2.500 meters of altitude, where there is a educative centre for the community.This multilateral EVS project will send three European volunteers in Costa Rica, one from Spain, another one from Italy-and the other one from Portugal, who will share experiencesfor 6 months colaborating to maintain and improve the educative centre. The main goal of this project is to involve the young people in activities of protection of the natural environment in a tolerant and intercultural context. While realizing activities of mainteinance of the gardens, improvement of the didactic tools, preparation of new routes for eco tourism, etc. the volunteers will know the social reality of Costa Rica and will integrate themselves in the local community, staying in direct contact with the families and the young people of this area. Thanks to this EVS, the development of the environmental education will be promoted among the children, the young people and the rest of the population of Quebradas, and of course among the European volunteers.