Environmental Science
The aurora is produced by:

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

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Environmental Science
The climate of a given region is

average temperature and precipitation conditions for every day of the year in a given region
its weather
its weather patterns
average temperature and precipitation conditions

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Environmental Science
Infrared and visible satellite images might provide:

A way of determining cloud thickness and altitude.
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.

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