Across
- 3. Able to live or grow correctly.
- 4. Area where a river meets the sea
- 7. Protect;guard.
- 11. Removal of dirt and debris.
- 12. That interact in an enviroment.
- 13. Of water,or containing water watery.
- 15. Used up.
- 17. The system of animals, plants, and other
- 18. Next to one another, touching.
- 20. Pollutant.
Down
- 1. The network of streams and rivers that
- 2. Into a lake or ocean.
- 4. A state of balance.
- 5. Sprawl The uncontrolled spread of cities and development into country areas.
- 6. Producing in abundance, fruitful.
- 8. From the area;local.
- 9. Extremely valuable;beyond price.
- 10. Stated as a law or clue.
- 14. Extensive.
- 16. Essential.
- 19. Poison.