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To:
jetson
“Used O2” is CO2
That is the exact function of your lungs.
69
posted on
08/30/2016 4:22:02 PM PDT
by
editor-surveyor
(Freepers: Not as smart as I'd hoped they'd be)
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To:
editor-surveyor
Si senior
71
posted on
08/30/2016 4:23:09 PM PDT
by
jetson
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