2007-06-24 11:38:15 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Botany
It is difficult to answer as the question is ambiguous.
2007-06-28 00:12:04 · answer #1 · answered by Anonymous · 0⤊ 0⤋
We can only use oxygen for respiration. The oxygen level in air at sea level is about 20%, the rest is nitrogen and minute traces of various other gases. If you lower the percentage of oxygen in air the breathing would have to be more rapid to supply your lungs with sufficient oxygen. At a level of 10% you would most likely be already very stressed and panting rapidly. People living at very high altitudes will be able to survive in lower levels of "O" than most of us. It is against the law to make an experiment to be able to give you an accurate answer to your question!
2016-04-01 02:40:09 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Compared to what? The amount in our bodies overall? The amount in the atmosphere? Or do you mean how much of what we breathe do we use?
2007-06-24 11:42:14 · answer #3 · answered by Lady Geologist 7 · 0⤊ 0⤋