| http://www.w3.org/ns/prov#value | - Nitrogen in general is a big part of the inhaled air, in fact 80% of air is nitrogen, normally nitrogen atoms bound to float to each other like chemical couples, but when the air is heated as in the boiler flame (F = 3000 1648 C), nitrogen atoms are split and bound with oxygen, forms as nitrogen oxides, or it is sometimes referred to as NOx.
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