Most ozone gas (about 90%) is located in the atmospheric layer of
- A.ionosphere
- B.troposphere
- C.stratosphere
- D.mesosphere
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About 90% of the atmosphere's ozone lies in the stratosphere, forming the ozone layer. The stratosphere extends from the top of the troposphere, about 8 km at the poles and 18 km at the equator, up to about 50 km.
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