Question

Why all the oxygen of atmosphere does not get used up though a large number of organisms are consuming it ? Who is refilling the oxygen in the atmosphere ?

Answer 1

The plants are refilling the oxygen.

Step-by-step explanation:

Plants need carbon dioxide to produce their food, the same way humans need oxygen to utilize energy. They absorb the carbon dioxide and give of oxygen as a by-product. The process is called photosynthesis.