What does CONSERVATION mean? A online course?

Answer 1

If you don't know, you probably shouldn't be taking the class!

Answer 2

The act or process of conserving.

Preservation or restoration from loss, damage, or neglect: manuscripts saved from deterioration under the program of library conservation.
The protection, preservation, management, or restoration of wildlife and of natural resources such as forests, soil, and water.
The maintenance of a physical quantity, such as energy or mass, during a physical or chemical change.

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Answer 3

Here's an entire course on water conservation.

http://www.pdhonline.org/courses/c123/c123.htm

I hope this is what you need.