The knowledge conservation

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Across
  1. 2. Able to continue without harming the environment
  2. 4. People who attend classes to learn
  3. 6. Close connections between people
  4. 12. A person who studies how people use plants
  5. 13. Information and understanding gained through experience
  6. 15. Traditions and way of life of a group
  7. 16. A number of different kinds
  8. 17. Plants grown for profit
  9. 18. A confusing mixture of things
  10. 20. A large forest with high rainfall
Down
  1. 1. People living in a particular place
  2. 3. Native to a particular country or area
  3. 5. The activity of catching fish
  4. 7. A plant used to make a popular drink
  5. 8. To write down information
  6. 9. A place for higher education
  7. 10. Protecting and preserving something
  8. 11. The study of how people use plants
  9. 14. The Islands are mentioned as a place where overfishing was a problem.
  10. 19. Something used to cure illness