IN ONE PAGE YOU KNOW HOW IT ALL HYDROGEN EARTH HAS BEEN CONSUMED ANY WATER TO FORM AND WHY ON EARTH IS NITROGEN 78% AND OXYGEN 21%
The three gases (nitrogen, hydrogen, oxygen) exist at the same proportions, 3 equal volumes. The volume of hydrogen is combined in whole with ½ volume of oxygen to form all the water from the ground, which explains its absence in almost air. ½ of the remaining volume of oxygen formed the ozone layer and the breathable O2 representing 21% of the air current, nitrogen is known by its inertia to respond, which explains its abundance (78% of 'air).
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