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Introduction:

Most of us are well acquainted with oxygen and its importance for us. Without oxygen we simply die. Also fish will die if the water does not any longer hold oxygen. But many are not that acquainted with nitrogen, what it is, where it is and how important it is. 
 
So the starting point is this: without nitrogen we would not be able to live either. Nitrogen in one of its forms is a building stone for producing proteins and this again for building our muscles and all muscles in all animals. It is indispensable as part of enzymes without which our bio-chemical processes could not happen and we would also die along with the whole world of animals. 
 
Nitrogen is used in synthetic fertilizers and when farmers use too much of nitrogen, it ends up in streams and lakes, where it can result in the dying out of fish and all life dependent on oxygen. This happens because the nitrogen results in a large growth of aquatic plants, and when these then die, the organisms that break down the plant material will use up all of the oxygen. This is called eutrophication. 
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Nitrogen is the largest single constituent of the Earth&#39;s atmosphere (78 % by volume of dry air). Like other chemical elements it has been created by fusion processes in stars, and is estimated to be the seventh most abundant chemical element by mass in the universe. 
 
Molecular nitrogen and nitrogen compounds have been detected in interstellar space by astronomers using the Far Ultraviolet Spectroscopic Explorer. Molecular nitrogen is a major constituent of the Saturnian moon Titan&#39;s thick atmosphere. 
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Nitrogen is present in all living organisms, proteins, nucleic acids, and other molecules. It typically makes up around 4% of the dry weight of plant matter, and around 3% of the weight of the human body and thereby the weight of nitrogen in our body is a bit bigger than the weight of our brain. 
 
It is a large component of animal waste in the form of urea, uric acid, ammonium compounds and derivatives of these nitrogenous products, which are essential nutrients for all plants that cannot make direct use of the atmospheric nitrogen. 
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Nitrogen also occurs naturally in many minerals, such as saltpetre (potassium nitrate), Chile saltpetre (sodium nitrate) and sal ammoniac (ammonium chloride). Most of these are uncommon, partly because these minerals are so easily dissolved in water.&nbsp; 
 
Enjoy to get to know about nitrogen!

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