Evaporative cooling is a natural process that occurs when water changes from a liquid to a gas. As water evaporates, it absorbs heat from the surrounding air, which lowers the air temperature. This principle is commonly used in swamp coolers and evaporative air conditioning systems, especially in dry climates. This cooling method is energy-efficient and environmentally friendly, as it primarily relies on water and air. Unlike traditional air conditioning, which uses refrigerants, evaporative cooling can help reduce energy consumption while providing a comfortable indoor environment during hot weather.