During photosynthesis, plants absorb carbon dioxide (CO2) from the atmosphere. This process occurs mainly in the leaves, where sunlight, water, and carbon dioxide are converted into glucose and oxygen. The absorbed carbon dioxide is one of the essential raw materials for this energy-producing process, allowing plants to create their own food. Photosynthesis not only supports the growth and energy needs of plants but also provides oxygen, making it a crucial aspect of life on Earth, as it contributes to the overall balance of gases in the atmosphere.