As part of a reflection on climate change, we thought it pertinent to make young Europeans from different countries meet to communicate and share opinions on this topical issue. Indeed, our students show particular interest and receptiveness on such current issues and are willing to swing into action to protect the Environment. We have chosen to use multilingual theatrical practice to tackle this issue ( German, French, Italian languages) in order to reinforce equally the students' language skills, self-confidence and autonomy. The objective will therefore be for the students to create short plays using the three languages. These plays will be performed on the occasion of the last mobility in the French high-school. The number of participants amounts to 40 French students (20 German learners- 20 Italian learners belonging to « European section » classes in the school), 20 German students, 20 Italian students learning French as a foreign language and doing drama. So as to ensure the cohesion of the group of participants, it was decided that the project should last only one year. The teachers supervising the project in each country are language teachers and/or drama teachers. The teaching of languages and drama should radiate all the more at the outcome of the project, which will demonstrate all the richness and quality of studying in a collective way languages and drama associated with societal topics. The project is bound to have an impact on the schools' involvement in sustainable development.