Question

What is the importance of nitrogen and it's role in life?

Answer 1

http://soyroothair.org/education/17-the-role-of-nitrogen-in-the-biosphere.html

Answer 2

very very goood link

Answer 3

Nitrogen is an essential component of many organic molecules. It plays a vital role in human respiration by providing air for humans to breathe. Nitrogen is excessively important; otherwise we would all die.
Our body needs nitrogen to synthesis bio-molecules like proteins in your muscles, skin, blood, hair, nails and DNA.