Saving the world by singing is the dream of a hundred children between the ages of 8 and 11 in Nice in the south of France. They are the protagonists of a participatory and ecological opera: babel. Conceived by the French director Magali Thomas and the Italian composer Sergio Monterisi, this committed work sees the light of day at the Opéra Nice Côte d’Azur accompanied by images of a great defender of the environment in France, Yann-Arthus Bertrand, sponsor of this world creation.