The primary energy source for most life on Earth is solar energy. This energy is harnessed by photosynthetic organisms, such as plants, algae, and some bacteria, which convert sunlight into chemical energy through photosynthesis. During this process, solar energy is used to convert carbon dioxide and water into glucose and oxygen. This organic matter serves as the foundation of food webs, supporting the vast majority of life forms. Thus, the conversion of solar energy into biochemical energy is vital for sustaining ecosystems.