Wind is the movement of air in the atmosphere, driven primarily by differences in temperature and pressure. It plays a crucial role in weather patterns and climate dynamics. Wind occurs because of the uneven heating of the Earth's surface by the sun, causing air masses to move from areas of high pressure to low pressure. It can vary greatly in speed, direction, and intensity depending on local and global atmospheric conditions. Wind is harnessed for various purposes, such as generating electricity through wind turbines and facilitating activities like sailing and flying.