Environmental Science
In the stratosphere, the air temperature normally:

Cannot be measured
Both increases and decreases depending on the season
Decreases with increasing height
Increases with increasing height

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Environmental Science
Infrared and visible satellite images might provide:

A way of identifying clouds suitable for cloud seeding.
A way of distinguishing between "new" and "old" clouds.
A way of distinguishing between wet and dry clouds.
A way of determining cloud thickness and altitude.

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