Environmental Science
Most harmful environmental pollutants are

human organic wastes
natural nutrients in excess
waste animal feed
non-biodegradable chemicals

ANSWER DOWNLOAD EXAMIANS APP

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 determining cloud thickness and altitude.
A way of identifying clouds suitable for cloud seeding.

ANSWER DOWNLOAD EXAMIANS APP