A Fable for Tomorrow Liu Dan Unit 15 Background Information ♂ Know what ?
What is the Nitrogen Cycle?. What is Nitrogen? N for Nitrogen on the Periodic Table Necessary building block in living things Air = 78% Nitrogen gas.
The Nitrogen Cycle. The largest single source of nitrogen is in the atmosphere. N 2 makes up 78% of our air! Nitrogen is NOT a greenhouse gas!
