Environmental Science
Infrared and visible satellite images might provide:

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.
A way of identifying clouds suitable for cloud seeding.

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Environmental Science
The aurora is produced by:

Scattering of sunlight in the upper atmosphere
Reflections of sunlight by polar ice fields
Fast-moving charged particles colliding with air molecules
The combination of molecular and atomic oxygen to form ozone
Burning oxygen caused by the intense sunlight at high altitude

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