Why do green plants require solar energy?

Green plants require solar energy for the process of photosynthesis, which allows them to convert light energy into chemical energy in the form of glucose. This process involves capturing sunlight using chlorophyll in their leaves, which drives the transformation of carbon dioxide and water into sugars and oxygen. The glucose produced serves as a vital energy source for growth, reproduction, and metabolic functions. Additionally, photosynthesis is crucial for the ecosystem, as it releases oxygen and provides food for other organisms.