Question: why cfcs destroy the ozone layer?
Answer: Let's see in detail how CFCs, combined to ozone molecules, cause the ozone depletion. ... In fact, they break up only through sunlight, which divides their molecules, causing the release of chlorine (Cl). Once the chlorine is released, it is able to react with ozone (O3), to form chlorine monoxide (ClO) and oxygen (O2).