Photosynthesis and respiration keep levels of oxygen and CO2 at equilibrium?
When you breathe, you breathe in 21% of oxygen and 0.03% of carbon dioxide. When
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you breathe out, you breathe out 17% of oxygen 4% of carbon dioxide.
Photosynthesis and respiration keep levels of oxygen and CO2 at equilibrium?
When you breathe, you breathe in 21% of oxygen and 0.03% of carbon dioxide. When
.
you breathe out, you breathe out 17% of oxygen 4% of carbon dioxide.
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