I was just wondering, does anyone monitor the amount of oxygen in the atmosphere ? To me the air seems to be getting thinner, is that possible ? I mean there's more and more people with breathing conditions that require assistance of artificial means in order just to breathe. Is the oxygen level dropping ? Will we ever run out of oxygen ? Is this going to be the next big problem, it would be a huge One. Thanks, science minded people only need reply. Requested, might be a better word. Thanks again.