Oxygen is returned to the atmosphere mainly by

Oxygen form…... of the atmosphere

What is the percetage of CO_(2)" and "O_(2) in the air ? Name the hiological process by which these gases are mainly returned to the atmosphere.

Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere , even then carbon dioxide is considered to be responsible for green house effect. Explain why ?

Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere , even then carbon dioxide is considered to be responsible for green house effect. Explain why ?

_____________ is an allotrope of oxygen: It is formed at upper atmosphere by action of UV lighten oxygen.