Plants use carbon dioxide (CO₂) in a process called photosynthesis, which is essential for their growth and survival. During photosynthesis, plants convert light energy, usually from the sun, into chemical energy stored in glucose, a type of sugar. Here’s a detailed look at how plants use carbon dioxide:

• Absorption: Plants take in carbon dioxide from the air through small openings in their leaves called stomata. These tiny pores can open and close to regulate gas exchange and water loss.

• Photosynthesis Process: Once inside the leaf, carbon dioxide enters the plant cells and reaches the chloroplasts, which contain a green pigment called chlorophyll. Chlorophyll absorbs sunlight and uses its energy to initiate the photosynthesis process.

• Chemical Reaction: In the chloroplasts, carbon dioxide combines with water (H₂O) absorbed by the plant roots to form glucose (C₆H₁₂O₆) and oxygen (O₂). The overall chemical equation for photosynthesis is : 6𝐶𝑂2+6𝐻2𝑂+𝑙𝑖𝑔ℎ𝑡 𝑒𝑛𝑒𝑟𝑔𝑦 → 𝐶6𝐻12𝑂6+6𝑂26CO2​+6H2​O+light energy → C6​H12​O6​+6O2​ This reaction essentially transforms light energy into chemical energy.

• Glucose Utilization: The glucose produced during photosynthesis serves multiple purposes for the plant. It is used as an energy source for cellular respiration, which provides the energy necessary for growth, repair, and other vital functions. Additionally, glucose can be converted into other substances such as starch and cellulose, which are used for energy storage and structural support, respectively.

• Oxygen Release: As a byproduct of photosynthesis, oxygen is released into the atmosphere through the stomata. This oxygen is essential for the respiration of most living organisms, including humans.

• Role in the Carbon Cycle: By using carbon dioxide for photosynthesis, plants play a critical role in the carbon cycle. They help remove CO₂ from the atmosphere, mitigating the greenhouse effect and contributing to climate regulation.