Across
- 2. chemical element with the symbol Cu
- 5. the practice of using natural resources responsibly, so they can support both present and future generations.
- 6. diverse group of aquatic organisms, the largest of which are seaweeds.
Down
- 1. management, cultivation, and harvesting of trees and other vegetation in forests
- 3. fossil fuel formed from the remains of ancient organisms. Also called crude oil
- 4. chemical element with the symbol Zn
- 7. act in which earth is worn away, often by water, wind, or ice