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That's because it's easily explained. About half the O2 lost through burning of hydrocarbons becomes CO2. Other half becomes H2O. The latter doesn't increase
by mchannon 10y ago
That's because it's easily explained. About half the O2 lost through burning of hydrocarbons becomes CO2. Other half becomes H2O. The latter doesn't increase its percentage in the atmosphere just because there's more of it.
- hartator 10y agoYeah, but my point is that lack of O2 is very easy to explain why it's bad of the health!
- mchannon 10y agoSilly point. O2 shortages are irrelevant- 210,000ppm to 209,800ppm O2 is far less of concern than 300ppm to 400ppm CO2.
- mikeash 10y agoAnd keep in mind that atmospheric pressure (and thus the partial pressure of oxygen) routinely varies by 10% or more due to weather, and people live at altitudes where the pressure is as low as 50% below sea level.