The CO₂ and O₂ are used up to produce energy in the process of the photosynthesis and respiration. the process of the photosynthesis are used by the plants to produce energy in the form of the sugar.
The photosynthesis is the process used by the plants in which plants use sunlight, water and the carbon dioxide to produce the oxygen and the energy , the energy is in the form of the sugar or glucose. The respiration is the process by animal used oxygen to get energy from the food.
Thus, the process of the photosynthesis and the respiration in which the CO₂ and O₂ are used up to produce energy.
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