Termite and ventilation system

Available for over a year

A building which heats and cools itself? How was that possible? Termites had the answer. The insects circulate air around their homes or mounds and regulate the temperature inside. They inspired an architect called Mick Pearce, who was designing the heating and ventilation system for a large office and retail building in Harare. With Patrick Aryee. www.bbcworldservice.com/30animals #30Animals