Let's start with natural ozone in the atmosphere. The third atom is loosely held to the new ozone molecule which gives it a 20 to 100 hour half-life.
Nature produces ozone in other ways, too.
The electrical discharge of lightning creates ozone, which is why the air smells so fresh and clean after a thunderstorm. The ozone has oxidized the pollutants in the air. Many people even hang their laundry out to dry after a thunderstorm to capture the fresh scent. Yet like most things in nature, there is danger in excess. It sounds like the perfect scenario for air-pollution cleanup.