Question

why can humans survive only on o2 and not on co2?​

Answer 1

Our blood has evolved to capture the oxygen we breathe in and bind it safely to the transport molecule called haemoglobin. If you breathe air with a much higher than normal O2 concentration, the oxygen in the lungs overwhelms the blood's ability to carry it away.

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Answer 2

Answer:

I have the best answer

Explanation:

because GOD