Environmental Science
Infrared and visible satellite images might provide:

A way of determining cloud thickness and altitude.
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.

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Environmental Science
The atmosphere near the earth's surface is "heated from below." Which of the following does not significantly contribute to this heating?

Absorption of infrared energy that has been radiated from the surface
Convection from a hot surface
Heat energy from the earth's interior
Conduction of heat upward from a hot surface

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