This project essentially aims to give participants the desire and then the reflex to open up to their territory and their environment: - To see the richness but also the complexity. - To understand that the environment is an essential component of their personal development. - To discover that man does not live alone in a world, and that he must share it harmoniously. We have the power to act on global warming and on the protection of nature. Between denial, minimization of the phenomenon and of one's own responsibility, many do not realize that they have a much more effective power of action than they realize. We are convinced that the evolution of practices will largely pass through our current youth. Thanks to this stay "Becoming European Ambassadors for Nature", we will give them levers for action so as not to remain victims of the phenomenon, nor to let themselves be won over by eco-anxiety. We will strive to develop their critical thinking through the presentation of speakers who will present diversified approaches, different arguments and speaking workshops to practice, debate and argue. Project objectives: - Share the different approaches to current environmental issues in the different countries of origin of the participants. - Discover the social and cultural realities on the ground by meeting actors and experiencing conviviality, solidarity in the mountain environment. - Grow the spirit of European ambassadors for nature. - Understand the urgency of acting for the benefit of nature and everyone. - Observe and analyze your environment, mountain nature, climate impact. - Gain autonomy in a mountain environment. - Undertake to put in place proposals for solutions discussed together. The learning objectives are: - Live in community, define the rules and take the means that they are known to all, ensure that these rules are respected. - Discovery of the environment and the interactions between the species present. - Speak in public (eloquence contest). - Establish a group summary. Write a text. Choose words and titles. - Choose arguments to convince. Accept contradiction. Put yourself in the other's place. - Be able to communicate with strangers by developing non-verbal communication. - Take a shot and frame a photo. - Edit a video or photo presentation. - Keep a daily blog. This exchange should allow a better knowledge of the workings of man and nature and of man in nature. We want the participants to experience their differences as so many riches in order to transform possible competition into necessary complementarities. This exchange aims to make the young actors of their stay and thus to promote the awareness of a European citizenship, to be co-constructed together.