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Across
  1. 3. The ___ we breathe
  2. 5. Critically endangered California native
  3. 8. Methodical study of the material world
  4. 10. Grass or clean energy
  5. 12. Energy from the sun
  6. 16. "Take ___ pictures, leave ___ footprints"
  7. 17. Earth's UV shield
  8. 18. Like Don Quixote's foe
  9. 21. Environmental long-term planning
  10. 24. 2006 documentary: "Who Killed the ___?"
  11. 26. Established 1970; _.P.A.
Down
  1. 1. National Parks' father
  2. 2. The ___ we drink
  3. 4. Audobon Society obsession
  4. 6. Landscape; scenery
  5. 7. 2023 Earth Day slogan: "___ Our Planet"
  6. 9. Place to grow plants at home
  7. 11. The blue marble
  8. 13. Type of energy, as from Folsom Dam
  9. 14. Fertilizer, or how to make it
  10. 15. The ___ that feeds us
  11. 19. Fuzzy flying pollinators
  12. 20. Largest river in California
  13. 22. At the north and south pole
  14. 23. Reduce, Reuse, ___
  15. 25. For planting, or giving a hug