Turning local materials into solar technology

Dr. A. Jagadeesh, founder President of the Society of Science for the People in India, explains his design for a solar water pre-heater for cooking. This simple technology can significantly decrease the amount of fuel used to cook food in rural areas of developing countries. The basis for the solar water pre-heater is the fact that the use of pre-heated water of 60C to cook food, particularly rice, dal and maize, lowers cooking times considerably and leads to substantial fuel savings.