A swamp cooler, also known as an evaporative cooler, is a device used to cool air through the evaporation of water. It works by drawing warm air through water-saturated pads, which cools the air before it is circulated into a space. This method is particularly effective in dry climates, where the low humidity allows for efficient evaporation. Swamp coolers are energy-efficient and environmentally friendly compared to traditional air conditioning systems. They require less electricity and can help reduce indoor temperatures naturally. However, they are less effective in humid areas, as high moisture levels hinder the evaporation process.