Conservation
con·ser·va·tion -noun
| 1. | the act of conserving; prevention of injury, decay, waste, or loss; preservation: conservation of wildlife. |
| 2. | official supervision of rivers, forests, and other natural resources in order to preserve and protect them through prudent management. |
| 3. | the careful
utilization of a natural resource in order to
prevent depletion.
source: www.dictionary.com |