8 key facts about Nitrogen.

1. Nitrogen makes up 80% of the earths atmosphere.
2. Animals get there Nitrogen from plants the only animal able to fix Nitrogen is man.
3. Nitrogen is one of the four main elements of life.
4. No living cell can exists without Nitrogen.
5. To complete the cycle bacteria in the soil carry out a process knowen as denifritication which converts nitrates back into nitrogen gas.
6. Nitrogen in the air becomes apart of biological matter mostly through the actions of bacteria and alge in a process known as nitrogen fixation.
7. Nitrogen will only react with oxgen in the presense of high temperates and pressures found near lightng bolts nitric oxide NO, and nitrogen dixocide NO2, are formed under these conditons.
8. Eventually Nirogen dixocide may react with water in rain to form Niric acid HNO3 this is used by plants as nutriants.