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What are Troposphere and Stratosphere ?...

What are Troposphere and Stratosphere ?

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Troposphere : The major portion of the atmosphere which contains air is called troposphere. `to` It is present 0 -11 km from the earth.
Stratosphere : Stratosphere present 11 - 50 Km from the earth and it mainly contains ozone layer. "It absorbs the harmful UV radiations coming from sun.
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