Key words

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Across
  1. 2. ray of light
  2. 4. in direction to the shore
  3. 6. the way you act
  4. 8. the lights on the streets
  5. 12. to keep from being damaged
  6. 13. when the lights go off
  7. 15. to move
  8. 16. contaminate
  9. 18. not well used
Down
  1. 1. let go
  2. 2. advantage you get from something
  3. 3. ask myself
  4. 5. what you do with your eyes
  5. 7. all that surrounds us
  6. 8. habitable places around a big city
  7. 9. baby animals breaking the shell of the egg
  8. 10. a group of animals
  9. 11. someone who works to protect the environment
  10. 14. damage
  11. 17. less