conservation

Conservation is the act of trying to protect or preserve something or the limiting of how much of a resource you use. (noun)

An example of conservation is a program to try to preserve wetlands.
An example of conservation is a program to try to save old buildings.
An example of conservation is an attempt to minimize the amount of electricity you use by turning off lights when you leave a room.

See conservation in Webster's New World College Dictionary

noun

the act or practice of conserving; protection from loss, waste, etc.; preservation
the official care, protection, or management of natural resources
the preservation, reconditioning, and restoration of works of art

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See conservation in American Heritage Dictionary 4

(kŏnˌsûr-vāˈshən)

noun

The act or process of conserving.
a. Preservation or restoration from loss, damage, or neglect: manuscripts saved from deterioration under the program of library conservation.
b. 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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