Our Fragile Ecosystem

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