A disturbing report from South Africa's University of Johannesburg has uncovered alarming levels of cancer-causing chemicals in the Klip River - a vital water source in the Gauteng province. The study reveals high concentrations of polycyclic aromatic hydrocarbons, or PAHs, which pose a significant threat to aquatic life, livestock, and human health. Lulu Gaboo spoke to Dr. Mathapelo Seopela, Lecturer and Researcher at the Department of Chemical Sciences at the University of Johannesburg.