This is an Erasmus + project : after leading online shared activities all along the school year on the topics of sustainable development and climate change, our final aim is to gather students from different nationalities together at the end of the school year, organize a European conference on those topics while they embody the different entities on which they will have previously worked on, let them debate in various commissions using controversy mapping, reach a consensus and be able to write an open letter to alert authorities on the state of the climate on our planet and suggest them to take precise measures to improve it. On the last day of the conference, students will meet local and regional press to deliver their open letter and get in touch with influent people through networks for the same purpose . Finally in November 2022, they could take part online, to COP 27. Keywords : foreign language, digital competence, social and civic competence, sense of initiative and cultural awareness