Do humans produce methane?

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Tags

1. #these
2. #produced
3. #produce
4. #contribute
5. #containing
6. #humans
7. #dioxide
8. #normal
9. #amounts
10. #subjects
11. #flammable
12. #volume
13. #contains
14. #ignited
15. #carbon
16. #methane
17. #hydrogen
18. #flatus
19. #adequate