Air currents are movements of air that occur in the atmosphere due to differences in temperature and pressure. Warm air rises, while cooler air sinks, creating a flow that can travel long distances. These currents are essential for weather patterns and can influence climate in various regions. There are different types of air currents, including jet streams, which are fast-flowing air currents high in the atmosphere, and trade winds, which blow from east to west in the tropics. Understanding air currents helps meteorologists predict weather changes and patterns, making it crucial for daily forecasts.