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What is reactive nitrogen?

Reactive nitrogen (Nr) includes all forms of nitrogen that are biologically, photochemically, and radiatively active.  Compounds of nitrogen that are reactive include the following: nitrous oxide (N2 O), nitrate (NO3 -), nitrite (NO2 -), ammonia (NH3), and ammonium (NH4 +). Reactive forms of nitrogen are those capable of cascading through the environment and causing an impact through smog, acid rain, biodiversity loss, etc. 

The non-reactive form of nitrogen is N2  and makes up about 80% of our atmosphere.  This form of nitrogen does not contribute to the environmental impacts noted above. 

Unless otherwise noted, the term “nitrogen” or “N” on the N-Print website refers to “reactive nitrogen” – not its non-reactive diatomic form.