NATURE

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Across
  1. 4. hard and gray
  2. 7. very hot day
  3. 9. green, soft, no flowers
  4. 10. the seed grows
  5. 12. Niagara falls
  6. 13. colorful, different types, pleasant aroma
  7. 18. green areas, public space, children games
  8. 19. construction, above the river
  9. 20. smaller than ocean
Down
  1. 1. on the ground surface
  2. 2. arid, dry
  3. 3. a lot of rain and lightning
  4. 5. wet, biodiversity
  5. 6. snowflake
  6. 8. expulsion of magmatic material
  7. 11. portion of land
  8. 14. necessary for surfing
  9. 15. shells something found in the sand on the beach
  10. 16. bigger than a lagoon
  11. 17. high density of trees