In the face of the climate emergency, is civil disobedience legitimate?

Faced with the climate emergency, is civil disobedience legitimate? We welcome two members of "Grandparents for the Climate" who testify to their actions. Opposite them, Clémence Demay, lecturer and researcher at the public law center of the University of Lausanne, analyzes the legal stakes of these acts. A face-off between legality, legitimacy and conviction.