Earth's primary source of energy is the Sun. Solar energy drives the majority of natural processes on our planet, including weather patterns, ocean currents, and photosynthesis in plants. The Sun emits light and heat, which are harnessed by various technologies, including solar panels, to generate electricity. Additionally, the Sun's energy is essential for supporting life, as it allows plants to produce oxygen and carbohydrates through photosynthesis. Other energy forms, such as fossil fuels, geothermal, and nuclear energy, ultimately stem from solar energy in the long term, emphasizing the Sun’s crucial role in Earth's energy landscape.