ozone
/ˈoʊzoʊn/
noun
- A colorless gas with a strong smell that is a form of oxygen. It is found in the air and is used for cleaning, but high amounts can be harmful.
- Ozone near the ground can cause breathing problems for some people.
- Some air purifiers produce ozone to remove odors.
- The air after a thunderstorm often smells fresh because of ozone.
- The layer of ozone in the upper atmosphere that protects the Earth from harmful ultraviolet radiation from the sun.
- A hole in the ozone was discovered over Antarctica in the 1980s.
- Scientists worry that chemicals are damaging the ozone.
- The ozone helps block the sun's most dangerous rays.