Great debate - Climate legislation: how to rally opinion?

Debate between Martine Rebetez, climatologist and professor at the University of Neuchâtel; Géraldine Pflieger, specialist in environmental governance and professor at the University of Geneva; Philippe Roch, former director of the Federal Office for the Environment; and Jérôme Cosandey, director of the Avenir Suisse think tank in French-speaking Switzerland.