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The composition of Earth's atmosphere air at sea level:


http://www.temp.campusnotes.net/images/thumb/6/68/Atmosphere_gas_proportions.gif/250px-Atmosphere_gas_proportions.gif

Nitrogen (N2) -...

With all due respect, 78% of nitrogen is in fact present in the air we are breathing.
The fact that nitrogen dissolves in human blood at higher pressures results in aeroembolism among amateur scuba...

By the way, oxygen is a strong oxidiser and breathing the pure oxygen can cause harm to your health.

Would it matter much if I say that the Slavs don't care much about each other nowadays? :mrgreen:

It appears, Danka has shared his/her pot with you.