Durbin, South Africa (IMAGE) University of South Florida (USF Health) Caption Rapid urbanization is causing a major strain on Durban's sewage system. Credit Daniel Yeh, PhD, College of Engineering, University of South Florida Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.