In this Christmas special episode of Exec Exchange, host Piers Clark converses with Ed Mitchell, Chief Executive of Water and Sanitation for Urban Populations (WSUP). They discuss the profound impact of shared sanitation on child health, focusing on a notable study conducted in Maputo, Mozambique. The conversation delves into Ed's career in water and sustainable development, the mission and achievements of WSUP, and the challenges faced in providing sanitation in densely populated urban areas. Key insights include the significant 31% reduction in stunting among children due to access to shared sanitation, the efficiency and funding of WSUP, and the broader implications for global sanitation and child development goals.