Geography

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Across
  1. 3. Requires twice as much water than vegetables
  2. 4. Breathed out by humans
  3. 8. Good quality, dark growing soil
  4. 13. An efficient irrigation system
  5. 14. Farming can cause a lot of this
  6. 15. The mixture of gases all around us
  7. 17. The idea that the weather is changing
  8. 18. Burned in most motor cars
  9. 20. Removing trees
  10. 21. A major crop grown in Western Australia
  11. 23. When fields are grazed for too long
  12. 24. A sweet additive in many processed foods
  13. 25. In summer this can kill
Down
  1. 1. The most important liquid for life
  2. 2. Too much water that swamps the land
  3. 5. The expansion of deserts
  4. 6. Food can be grown in deserts in these
  5. 7. WA soils are mostly this.
  6. 9. A fossil fuel extracted from the ground
  7. 10. When there is a severe shortage of rain
  8. 11. Fossil fuel burned in many power plants
  9. 12. Rising salt in the ground
  10. 16. A type of soil that holds a lot of moisture
  11. 19. Plants absorb this to grow their tissues
  12. 22. This vegetable is grown in SA deserts