Nature and The Environment

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Across
  1. 2. blocked or crowded
  2. 5. to talk or write about somebody or something
  3. 6. people living in a certain area
  4. 7. to use less than before
  5. 8. when you guess the meaning of something from the information you have
  6. 10. something you do with your nose
  7. 11. many people living in a very small area
  8. 12. a facial expression which means you're confused
  9. 15. if you eat these, you'll get very sick or die
  10. 17. to use things not only once, but again
  11. 20. a group of people born in the same period of time
  12. 21. unusual
  13. 22. dirty air
Down
  1. 1. unable to see clearly or far
  2. 3. few people living in a large area
  3. 4. able to be used again and again
  4. 9. a long passage under the ground
  5. 10. the area around you
  6. 13. grow
  7. 14. air
  8. 16. the protection of plants, animals & nature
  9. 18. the place we live
  10. 19. to enable rubbish to be used again