Title: Ozone crisis
Subjects: Environmental aspects of Atmospheric ozone, Atmospheric ozone, Environmental aspects, OZONE LAYER, Aspect de l'environnement, CHLORO-FLUOROCARBONS, Ozone atmosphérique, ENVIRONMENTAL PROTECTION, Umweltpolitik, Ozone, Ozon, Ozonschicht, CFC, Abbaureaktion, Pollution de l'air, Stratosphäre, Umweltkatastrophe, Ozone layer depletion, Environmental impact analysis