Et si les traînées blanches des avions n’étaient pas de la vapeur d’eau ? - Sur le front

More videos on FranceTV: https://www.france.tv/france-5/sur-le... Subscribe to follow Hugo Clément's investigations: https://bit.ly/surlefront We've always been told that the white trails we see behind airplanes are water vapor, harmless to the environment. But by analyzing the combustion of kerosene used in jet engines, a French researcher reveals that micro-particles of soot can also create high-altitude clouds that contribute to global warming. Why is the train always more expensive? (Full episode) - On the Front Lines with Hugo Clément    • Pourquoi le train est-il toujours plus che...