Environmental

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Across
  1. 4. largest and deepest Ocean
  2. 6. Cutting of trees
  3. 8. Strong wind and heavy rain
  4. 9. Area of land used to grow crops
  5. 12. Series of mountains or hills
Down
  1. 1. Shifts in temperatures and weather
  2. 2. The longest river
  3. 3. Coldest season of the year
  4. 5. Dry period
  5. 7. Most abundant element in the atmosphere
  6. 10. Giant waves caused by earthquakes
  7. 11. Body of salt water