ozone belt
nounUK /ˈəʊzəʊn bɛlt/
US /ˈoʊzoʊn bɛlt/
A layer high in the sky that keeps harmful sun rays away from us.
The ozone belt protects life on Earth from the sun's strong rays.
OTHER MEANINGS
2. A region of the upper atmosphere where ozone is concentrated.
Scientists measure ozone levels in the ozone belt to track its health.
3. A figurative barrier that shields something from harm.
The new rules acted like an ozone belt around the fragile market.
4. A band of ozone-rich air circling a planet.
The probe detected an ozone belt around the distant world.