Crossword / Unit 03 : Back to Nature

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Across
  1. 4. a large mass of ice
  2. 7. synonym of " to preserve"
  3. 9. giving water to the land so that crops will grow.
  4. 12. rise in the temperature of the Earth's climate
  5. 13. to pollute
  6. 14. adjective of "to poison"
  7. 17. illness, sickness, and _______
Down
  1. 1. when paper , glass , plastic …etc is collected to be used again.
  2. 2. opposite of increase
  3. 3. a long period when there is no rain
  4. 5. Co2
  5. 6. contamination of water
  6. 8. an amount of gas that is sent out
  7. 10. cutting down of trees
  8. 11. the presence of toxic emissions in the air
  9. 13. a total amount of collected fruit and vegetables
  10. 15. when oil spills into the sea
  11. 16. dirty liquid or waste water