by 
HungryGuy
ANSWERS: 4
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I think that everyone would start having breathing problems and resulting living on bottled oxygen and planting more trees.
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78.08% N2 20.95% O2 0.93% Ar 0.03% CO2 0.002% Ne I found these statististics. So if they are right, we would all die
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1) oxygen & oxygen-mask sales would increase 2) it would be a lot less crowded 3) no one would have to worry abouy a smoking-ban any more 4) i'd still have to go to work!
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Athlets simulate high attitude atmosphere in tents where oxygen level is controlled around 15%. Some storage buildings are protected against fires with atmosphere with the same oxygen concentration and not danger to human beings. Below this level appears lost of conciousness and dead. BR Shiva
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