The process that plants undergo to absorb carbon dioxide is known as photosynthesis. This process occurs primarily in the leaves, where chlorophyll captures light energy, converting it into chemical energy. During photosynthesis, plants take in carbon dioxide from the atmosphere and combine it with water to produce glucose and oxygen. This not only provides energy for the plant but also plays a critical role in regulating atmospheric CO₂ levels. Photosynthesis forms the foundation of food webs by converting solar energy into a form that supports all life on Earth.