Nitrogen can be used to inflate airplane tires, off-road truck tires, military vehicle tires, and race car tires for improved performance, more tire mileage and better fuel economy.
hope it helped :)The brain uses some as a neurotransmitter but there may be more reasons.
Nitrogen is used in the nitrogen cycle to help plants grow.
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http://en.wikipedia.org/wiki/Nitrogen#Applications
The roots extract nitrogen from the soil.
Since urea is an organic compound, the body has many uses for it. The most important being the use of excreting Nitrogen. It is also used in fertilizers since it is a good source of Nitrogen.
Ammonia is a combination of nitrogen and hydrogen with one nitrogen atom and 3 hydrogen atoms. It can be used as a fertilizer, cleaner, refrigerant, an antimicrobial product for food products, and a couple of other uses.
Everyone uses nitrogen. It is essential for life.
The Nitrogen that is used to make Ammonia (NH4) is extracted from the air.
Nitrogen is an essential part of proteins.
Bacteria
Plant growth.