Across
- 3. a community of living things and their environment
- 6. the act of leaving a place of danger
- 7. they depend on one another for their well-being
- 9. the depth at which water is found
- 10. the wearing away of land along the coast
Down
- 1. an event that causes great damage or suffering
- 2. an underground source of water
- 4. the poisoning of land, air, and water
- 5. a place where plants and animals live naturally
- 8. describes the use of sources of power that cost less and are less harmful to the environment