The air is made up of 78% of nitrogen, the
symbol by which
this gas is commonly showed is the letter N.
The word azote (nitrogen) comes from the ancient Greek
word AZOE, which means lifeless, colourless, unable to
preserve the life and the combustion.
In nature the nitrogen has the task to reduce the effects of the oxygen
that, without it, would provoke the combustion of a lot of substances
and the human beings molecules as well.