sustain te earth !!!!!!!!!

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Across
  1. 3. cool costal thingy
  2. 9. u wanna be a?
  3. 13. longest word u can't even spell LOL
  4. 14. wind! WATER! NATURE!!!
  5. 15. c'mon do it from the start
  6. 16. ANimas need homes
  7. 18. c'mon grass
  8. 19. to save
Down
  1. 1. organisms + enviroment
  2. 2. 4
  3. 4. reuse
  4. 5. its the opposite of the start
  5. 6. yummy
  6. 7. woah thats a long word PLANTS + FOOD
  7. 8. same as one
  8. 10. supply
  9. 11. end
  10. 12. repeats
  11. 17. oxygen