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Sergio039 [100]
3 years ago
13

Where does the carbon dioxide we exhale come from?

Biology
2 answers:
olga_2 [115]3 years ago
8 0
Well it does come from the air, but if you look into it a bit further, it comes from the decomposition of organisms, from the fossil fuels emitted off factories, and the exhalation of other animal life. : )
kkurt [141]3 years ago
7 0
The air as there are many elements in the air
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