Environmental Science
The primary source of energy for the earth's atmosphere is:

The sun
Energy from within the earth
Erupting volcanoes
Lightning discharges associated with thunderstorms
Latent heat released during the formation of hurricanes

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Environmental Science
Infrared and visible satellite images might provide:

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

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