Today, the spacial locations of pollutions ( greenhouse effects, ozon layer depletion, acid rains), and the scale of concern has grown to atmosphere and troposphere. It now goes from cities, or rural areas to the ozone layer Were are aiming for a greater awareness of this reality, wich would allow participants - To know the universe better in order to grasp and preserve life on planet Earth - To gain specific knowledge and develop new skills to help young people discover the solar system, and us astronomy in activies that foster learning about the natural environment and sustainable development - To nurture scientific vocations among youg peaople - To design create and evaluate activities that allow young people to * Grow their awareness of the causes and consequences of climatic change and pollutions that impact the atmosphere and life on planet Earth * Change their individual behaviour, within the family and groups of young people as they develop these values - Respect and preserve the ( natural, cultural, human) environment - Sustainable development - individual responsibility - Solidarity between people * Improve their knoledge about the solar system, which life and our future on earth depends on, of what is at stake with the European Spacial Agency - Develop cooperations bewtwen young people and youth policy actors on topics related to the environment, inclusion and solidarity.