Sustainability shyam and astha

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Across
  1. 5. You always keep it first
  2. 7. It stays the same
  3. 10. It comes from of the outside world
  4. 14. What we live on
  5. 15. it always changes
  6. 16. A person
  7. 17. Its always around us
  8. 18. A animal
Down
  1. 1. A good kind of drug
  2. 2. Keeping our environment and natural resources safe
  3. 3. to make something an important
  4. 4. a subject related to science
  5. 6. A thing that moves
  6. 8. To find our way to
  7. 9. a large piece of land
  8. 11. A other word for climate
  9. 12. You need it sometimes
  10. 13. One of the three main subjects
  11. 15. Use it for north south east west