No electricity

Clay can be used to cool homes, build furniture, preserve food, play music, and even purify air. Meet five innovators harnessing the potential of terracotta craft.

Tamil Nadu potter M Sivasamy has built a portable and eco-friendly refrigerator using clay, which can keep vegetables, milk, curd, etc. fresh for up to four days, without using electricity.

In their initial proof-of-concept testing, the researchers have managed to lower the temperature inside their device by six degrees Celsius, when compared to the temperature outside.