Meaning & use
ozone layer
A region of Earth's stratosphere containing a high concentration of ozone, which absorbs most of the sun's ultraviolet radiation.
See it in a sentence
Scientists discovered a large hole in the ozone layer above Antarctica in the 1980s.
The Montreal Protocol helped the ozone layer begin to heal by banning harmful chemicals.
A note on using this word
Do not confuse the protective ozone layer high in the stratosphere with ground-level ozone, which is a harmful pollutant.
Words with a similar meaning
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