Question

oxygen in the stratosphere that
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Answer 1

The lower boundary of the stratosphere is called the tropopause; the upper boundary is called the stratopause. Ozone, an unusual type of oxygen molecule that is relatively abundant in the stratosphere, heats this layer as it absorbs energy from incoming ultraviolet radiation from the Sun.

Answer 2

The stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere.