Water and Sewer

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Across
  1. 3. Long flowing line of water.
  2. 5. Living in a way that protects the future.
  3. 6. Soil or mud on the ground.
  4. 7. Saving nature and natural resources.
  5. 10. Small pool of rainwater on the ground.
  6. 11. Garbage we throw away.
  7. 15. What we do when we are thirsty.
  8. 16. Conduct for dirty water
  9. 19. Giving water to farm crops.
  10. 20. Keeping human waste and dirty water safe and clean.
  11. 21. Cleaning things with water.
Down
  1. 1. Tool that catches dirt to clean water.
  2. 2. Long time with no rain and dry land.
  3. 4. Dirt or sand that sinks to the bottom of water.
  4. 8. Turning trash into useful things again.
  5. 9. Water that is safe to drink.
  6. 12. Tube used to spray water on plants.
  7. 13. Pipe where used water goes down.
  8. 14. Container to carry water.
  9. 17. Water falling from the clouds.
  10. 18. Cleaning water by passing it through a barrier.