Natural disasters follow one another (drought, fires, floods, storms, etc.) and it has become urgent to protect the earth to face climate change. We sought to bring together young Europeans to address some questions related to ecology and sustainable development. What do young people know about these notions of ecology and “sustainable development”? How do they perceive this concept in their respective countries? How can they act together in various areas of daily life? What actions should they take to enable them to become eco-responsible citizens? How could we raise awareness around them?... The realization of this project should provide elements of answers to these questions and allow us to question the role that these young people could have in contributing to the protection of the planet , wondering what they could leave to future generations. We wanted them to question themselves to see what they can do and what can be done in different ecological areas (housing, food, health, industry, environment, seas and oceans, etc.). We wanted them to question their personal habits, to change them to consume better, to change behaviors to fight global warming. Despite their diversity, we hoped that they would acquire gestures and actions that would help them become eco-responsible, involved and active European citizens, capable in turn of raising awareness to help protect the planet in the future before It's not too late.