The primary source of energy for Earth's climate system is the sun. Solar energy drives various processes including photosynthesis, weather patterns, and ocean currents, which are essential for maintaining life on Earth. The sun's energy reaches our planet in the form of radiation, and this energy is unevenly distributed due to factors like the Earth's tilt and orbit. This uneven heating leads to climatic zones, influencing local and global weather patterns, and is crucial for sustaining diverse ecosystems.