The main source of energy for the Earth's climate is the Sun. Solar energy drives the majority of Earth's climatic and weather systems. Sunlight reaches the Earth and is absorbed by the surface, warming it and influencing temperature and weather patterns. The uneven heating of the Earth's surface due to its tilt, rotation, and the different properties of land and water leads to atmospheric movements, including wind and ocean currents. This interaction establishes various climates and environments around the world. Without the Sun, Earth's climate would be inhospitable and unable to support life as we know it.