Chlorophyll is a green pigment found in plants, algae, and some bacteria that plays a crucial role in photosynthesis. It absorbs light energy, primarily from the sun, and converts it into chemical energy by facilitating the transformation of carbon dioxide and water into glucose and oxygen. This process not only provides energy for the plants but also releases oxygen, which is essential for most life forms on Earth. Chlorophyll thus serves as a vital component in the ecosystem, supporting the food chain and contributing to the planet's oxygen supply.