becoming hard for me to breathe. The heavy air was no longer sufficient for the full play of my lungs. Although our cell was large, we obviously had used up most of the oxygen it contained. In essence, over an hour’s time a single human being consumes all the oxygen found in 100 liters of air, at which point that air has become charged with a nearly equal amount of carbon dioxide and is no longer fit for breathing.
So
becoming hard for me to breathe. The heavy air was no longer sufficient for the full play of my lungs. Although our cell was large, we obviously had used up most of the oxygen it contained. In essence, over an hour’s time a single human being consumes all the oxygen found in 100 liters of air, at which point that air has become charged with a nearly equal amount of carbon dioxide and is no longer fit for breathing.
So
