The primary energy source for the Earth's climate system is the Sun. Solar radiation drives various processes, influencing temperature, wind patterns, and ocean currents. This energy is absorbed, reflected, and scattered by the atmosphere, land, and water bodies, driving the climate and weather systems. The unequal heating of the Earth’s surface creates convection currents, contributing to weather phenomena like storms and rainfall. Additionally, solar energy fuels the photosynthesis process, which supports life on Earth by providing food and oxygen. Thus, the Sun is fundamental to both climate and ecological systems.