What would silicon based life breathe?

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Tags

1. #produced
2. #carbon
3. #sulphide
4. #atmosphere
5. #silicon
6. #without
7. #however
8. #monoxide
9. #based
10. #nitrogen
11. #exists
12. #reducing
13. #oxygen
14. #breathed
15. #probably
16. #containing
17. #hydrogen
18. #would
19. #dioxide
20. #gases