Mainly because in the health charts they also differ in height ,(however body frames also take a a little role into the weight but its hardly spoken about or included into the charts)
<span>CO2 narcosis. This happens when people are given too much oxygen...this slows down the oxygen driven drive to breathe and we breathe slower... Then CO2 can build up and reach levels that can be toxic...can be lethal as in hypercapnia.</span>
