discover the words

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Across
  1. 3. allows the boat to move
  2. 6. blue, vast and must be respected
  3. 7. made of synthetic materials and one of the most important polluters of climate change
  4. 8. we drink, we swim in it and produce it
  5. 9. piece of land completely surround by water
  6. 11. all around us and it needs our protection
Down
  1. 1. North-West
  2. 2. a little everyday action
  3. 4. sea creature, mammal and sings
  4. 5. vertical pole that holds the mainsail
  5. 10. at the beginning of a new day