Your friends are correct. Kindly refer them.
@others:- Good job guys. Keep posting!!
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Theozone layeris a layer inEarth's atmospherethat absorbs most of the Sun'sUV radiation. It contains relatively high concentrations ofozone(O3), although it is still very small with regard to ordinary oxygen, and is less than ten parts per million, the average ozone concentration in Earth's atmosphere being only about 0.6 parts per million. The ozone layer is mainly found in the lower portion of thestratospherefrom approximately 20 to 30 kilometres (12to19mi) above Earth, though the thickness varies seasonally and geographically.
The ozone layer was discovered in 1913 by the French physicistsCharles FabryandHenri Buisson.
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Theozone layeris a layer inEarth's atmospherethat absorbs most of the Sun'sUV radiation. It contains relatively high concentrations ofozone(O3), although it is still very small with regard to ordinary oxygen, and is less than ten parts per million, the average ozone concentration in Earth's atmosphere being only about 0.6 parts per million. The ozone layer is mainly found in the lower portion of thestratospherefrom approximately 20 to 30 kilometres (12to19mi) above Earth, though the thickness varies seasonally and geographically.
The ozone layer was discovered in 1913 by the French physicistsCharles FabryandHenri Buisson.
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Theozone layer is a layer in Earth's atmosphere that absorbs most of the Sun's UV radiation. It contains relatively high concentrations of ozone (O3), although it is still very small with regard to ordinary oxygen, and is less than ten parts per million, the average ozone concentration in Earth's atmosphere being only about 0.6 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to19 mi) above Earth, though the thickness varies seasonally and geographically.
The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson.
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The ozone layer is a layer in Earth's atmosphere that absorbs most of the Sun's UV radiation. It contains relatively high concentrations of ozone (O3), although it is still very small with regard to ordinary oxygen, and is less than ten parts per million, the average ozone concentration in Earth's atmosphere being only about 0.6 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to19 mi) above Earth, though the thickness varies seasonally and geographically.
The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson.

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