In July 2019, Ursula von der Leyen defended: "Our most pressing challenge [was] to protect our planet". "This is the greatest responsibility and the greatest opportunity we have today." Europe's future depends on a healthy planet. The EU countries are determined to achieve climate neutrality by 2050, in line with the commitments made in the Paris Agreement. The Green Deal for Europe is the EU's strategy for achieving the 2050 target. The Paris climate agreement, adopted on 12 December 2015 following the COP21 negotiations, came into effect on 4 November 2016. In 2019, 183 out of 197 parties have ratified it. The first universal international climate agreement, it represents a major step forward in the fight against global warming. In this joint document, almost all the countries on the planet agree, on the basis of scientific reports, on a common objective: to contain global warming to well below 2°C above pre-industrial levels by 2100, and to continue efforts to limit the rise in temperatures to 1.5°C. In addition, the goal of carbon neutrality (or zero net emissions) has been proclaimed, i.e. a balance between greenhouse gas emissions and the compensation provided by carbon sinks or reservoirs, such as forests. Like Greta Thunberg many young people can strike out to draw attention to the inadequacy of current measures to protect the climate and demand compliance with the Paris Climate Agreement. Even better though is to get involved as citizens to enable a common fight to keep our planet liveable. The project is a very good opportunity to start doing so. The aim of our exchange is to inform the young people about the role of the European Union in the fight for a more sustainable planet. Furthermore the goal is to gain a better understanding of what can be done at a more local level in each of their towns to combat climate change and to study what can be done in their daily lives to enter a more environmentally virtuous circle. As part of their exchange in Saint-Brieuc, the 18 young Germans, French and Greeks will take part in a public debate on environmental issues in their own countries, in Europe and around the world. To publicise their ideas, such as to take stock of their thinking on the ecological transition, they are going to organise a World Café with the local population and elected representatives. During the week they will be meeting experts and local residents interested in ecological issues and/or the organisation of their area. This will help them to prepare for this public event and get the debate started. The Worl Café will be the final opportunity to present the group's conclusions and recommendations on ecological transition issues. This event will be open to the general public. The main objective of this youth exchange is the intercultural encounter between young people itself, through games and debates on the theme of ecological transition. Our aim is to use this work on ecology to question a number of everyday practices that can have a carbon impact. And beyond this questioning at a personal level, to understand how our practices impact the environment at different levels. We then look at the actions that need to be taken at local, national and European level to achieve a shared vision at each level and, joint action that will enable us to reach our climate neutrality targets by 2050. To question our models, we are going to draw on a number of contradictions in our societies, in terms of traveling (tourism, business travels, language trips, youth exchanges, Erasmus). Air travel for example is a professional asset, nevertheless it has a disastrous impact on the climate. After taking stock of what is happening in our society, studying our ecological footprints and looking at the major local, national and European guidelines, the young people will be given the task of creating their own list of measures to take, in order to take rapid action on the ecological transition.