The process of converting light energy into chemical energy is known as photosynthesis. This crucial biological process occurs primarily in green plants, algae, and certain bacteria. During photosynthesis, light energy, usually from the sun, is captured by chlorophyll and used to transform carbon dioxide and water into glucose and oxygen. The glucose produced serves as an energy source for the plant and, by extension, forms the foundation of the food chain for many living organisms. Photosynthesis not only sustains plant life but also significantly impacts the Earth's atmosphere and ecosystems through oxygen production and carbon dioxide absorption.