Chemicals released during wildfires in Australia damaged the ozone layer
So basically, chlorine compounds (hydrochloric acid) in the atmosphere from CFCs (old aerosols, fridges) turn back into chlorine thanks to the smoke particles, which wouldn't otherwise happen, and the sun then causes the chlorine to break down in sunlight to chlorine ions which "eat the ozone".So it's a race against time between the ozone recovering through the decay of these CFC-related harmless chemicals, and smoke from wildfires making the ozone larger and not recovering.Not all wildfires send smoke high enough though.Interesting read!