VND Crossword

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Across
  1. 3. salts. (10)
  2. 5. contains only minimal quantities of
  3. 11. accumulations of valuable minerals that
  4. 12. a kind or sort in the world of biology. (7)
Down
  1. 1. Deepest point on earth. (14)
  2. 2. retain for future use. (7)
  3. 4. a self-propelled vehicle to reach the
  4. 5. their way to the ocean.(15)
  5. 6. thorough examination of a subject.(11)
  6. 7. by the sea. (7)
  7. 8. increase in economic activity or value. (6)
  8. 9. depths of the ocean.(11)
  9. 10. a term in economics relating to the exploitation preservation and regeneration of the marine environment. (11)