The Environment

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Across
  1. 1. Period of time with no rain (n.)
  2. 4. To become more (n./v.)
  3. 5. Reason (n./v.)
  4. 6. Dirtiness of air, water or land (n.)
  5. 8. To make (v.)
  6. 9. A fuel like oil and gas (n.)
  7. 13. Too thin (adj.)
  8. 14. To increase (v.)
  9. 15. When the water rises over the land (n.)
Down
  1. 1. To become less (n./v.)
  2. 2. Eg. carbon dioxide (n.)
  3. 3. An illness (n.)
  4. 7. To decrease suddenly (v.)
  5. 10. An area of trees (n.)
  6. 11. Something unsafe (n.)
  7. 12. To break forever (v.)