Coal dust and smog plague lives in South Africa's Highveld region South African NGOs are taking the state to court, accusing it of violating people's constitutional right to a healthy environment. At the heart of the case is one of the most polluted areas in the world - the South African Highveld, a region where hundreds of people die prematurely from health issues - victims of an invisible killer. A NATURAL SOUND VERSION OF AN AFPTV REPORT