The primary source of energy for the planet is the Sun. Solar energy drives most of the Earth's processes, including weather patterns, photosynthesis in plants, and the water cycle. This energy arrives in the form of solar radiation, which warms the Earth's surface and powers various ecological systems. Additionally, fossil fuels, wind, and hydroelectric power derive ultimately from solar energy as well, highlighting the Sun's vital role in sustaining life and energy production globally. As renewable energy sources grow, harnessing solar power is becoming increasingly significant for sustainable development.