Again, both the result of causing global warming.Group had see so interesting to study energy-saving fridge by not using electricity to be used in food preservation to keep longer and are treating the environment with an aim to study the ability to maintain the temperature of the refrigerator casing.Energy efficiency, indoor and outdoor, and to compare the ability of the system to maintain the temperature inside the refrigerator, saving work, indoor and outdoor experiments, how it is prepared clay pots that are the same size