Environmental problems and solutions (unit 6a-b)

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Across
  1. 3. to sink and die underwater
  2. 5. to no longer exist
  3. 9. to give sth out kindness
  4. 14. a paper container for letters
  5. 15. make sth dirty
  6. 16. a machine used in the house
Down
  1. 1. carbonated (drink)
  2. 2. hard, thick, brown paper for making boxes
  3. 4. to use sth again after its original purpose
  4. 6. no longer existing (e.g.animals)
  5. 7. to make less
  6. 8. to use more of sth than you need
  7. 10. affect
  8. 11. to become liquid because of heating
  9. 12. a layer of earth on the ground that plants grow in
  10. 13. items of unwanted waste