HSB Crossword

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Across
  1. 1. An acidic colourless gas
  2. 5. Garbage Dumb
  3. 6. Decomposing plant and food waste to fertilise soil
  4. 10. Toxic substances
  5. 11. Used to harm or kill insects
  6. 14. Collecting rainwater
  7. 15. A diarrheal illness
  8. 17. Tropical trees
  9. 19. Settling solid particles from fluids
  10. 20. Saving for the future
Down
  1. 2. Added into water to kill parasites, bacteria and viruses
  2. 3. repairing and returning the environment to a healthy state
  3. 4. harming the environment
  4. 7. Unwanted or unusable material
  5. 8. process used to remove sand, silt and grit from water
  6. 9. A body of water that flows downhill
  7. 12. High tempeture burning of waste
  8. 13. waste water
  9. 16. Liquid formed when waste breaks down in landfills
  10. 18. Reuse waste material