(2) How much is the proportion of the gases in the stratosphere?
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The Stratosphere
The stratosphere starts from where the troposphere ends. It extends to 31 miles off the earth surface. The layer accounts for 19 percent of the atmospheric gases. However, it has very little water vapor. In the stratosphere, there is a layer called ozone. It is formed by the dissociation of oxygen molecules into individual oxygen atoms.
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