Evaporative cooling is a natural process that occurs when water changes from a liquid to a gas. As water evaporates, it absorbs heat from its surroundings, which cools the air. This principle is commonly used in swamp coolers and evaporative coolers, which are devices designed to lower indoor temperatures by utilizing this effect. This cooling method is most effective in dry climates, where the air has low humidity. As the water evaporates, it adds moisture to the air, making it feel cooler and more comfortable. Evaporative cooling is an energy-efficient alternative to traditional air conditioning systems.