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What need air?

What need air?. Do they need air?. Do they need air?. Do they need air?. Do they need air?. Do they need air?. Do they need air?. Do they need air?. Bacteria. Do they need air?. Yeasts. Do they need air?. What need carbon dioxide?. Do animals need carbon dioxide?.

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What need air?

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  1. What need air?

  2. Do they need air?

  3. Do they need air?

  4. Do they need air?

  5. Do they need air?

  6. Do they need air?

  7. Do they need air?

  8. Do they need air?

  9. Bacteria Do they need air?

  10. Yeasts Do they need air?

  11. What need carbon dioxide?

  12. Do animals need carbon dioxide?

  13. Do plants need carbon dioxide?

  14. Water plants absorb co dissolved in water and they make the photosynthesis 2

  15. And you! What do you need? ? ?

  16. CO Air 2 & Breathe Protection

  17. Special equipment

  18. Why do you think these alpinists wear oxigen masks?

  19. Which do you think cars need air or carbon dioxide? Why?

  20. Which do you think buses need air or carbon dioxide? Why?

  21. Which do you think planes need air or carbon dioxide? Why?

  22. Which do you think astronaut cars need air or carbon dioxide?

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