Why does a wet poppy seed screen hung at the door keep the room cool?

A wet poppy seed screen hung at the door cools a room by utilizing the principles of evaporation and humidity control. As the water on the screen evaporates, it absorbs heat from the surrounding air, creating a cooling effect. Additionally, the screen can help block direct sunlight and reduce the amount of warm air entering the room. This combination of moisture and shade helps maintain a cooler indoor temperature.