Bruno Comby and Frédéric Marillier are both French environmentalists who believe global warming is real, dangerous, and has to be stopped. But Marillier heads the anti-nuclear campaign of Greenpeace France. He advocates renewable energies rather than a nuclear industry that he argues is expensive, dangerous and unreliable. Bruno Comby is president of Environmentalists for Nuclear Energy. He believes nuclear power is needed to help reduce co2 emissions and that global warming poses a bigger threat than nuclear catastrophe. Two different approaches to saving the planet now, in Agora.