Air circulation refers to the movement of air within the atmosphere, driven by differences in temperature and pressure. Warm air rises, creating areas of low pressure, while cooler air sinks, leading to high pressure. This process helps distribute heat and moisture around the planet, influencing weather patterns and climate. In addition to natural processes, human activities can also affect air circulation. For example, urban areas with many buildings can create heat islands, altering local air movement. Understanding air circulation is essential for predicting weather changes and addressing environmental issues like pollution and climate change.