1- What causes ozone molecules to break down?
2- What is the benefit of the ozone layer in the atmosphere for living organisms (humans, animals, and plants)?

1. ozone depletion occurs when chlorofluorocarbons (CFCs) and halons are released into the atmosphere

2. the ozone layer acts as a shield for life on Earth. Ozone is good at trapping a type of radiation called ultraviolet radiation, or UV light, which can penetrate organisms protective layers, like skin, damaging DNA molecules in plants and animals