An important factor that seriously affects that level of necessary carbon dioxide in the lungs is over-breathing, also known as hyperventilation.
(An important factor; seriously affects; that level of necessary carbon dioxide in the lungs) (An important factor that seriously affects that level of necessary carbon dioxide in the lungs; is; over-breathing)
An important factor An important factor that seriously affects that level of necessary carbon dioxide in the lungs
seriously affects is
that level of necessary carbon dioxide in the lungs
over-breathing