Author:Engelbrecht, JP; Swanepoel, L; Zunckel, M; Chow, JC; Watson, JG; Egami, RTDate:30 Mar 2000D-grade (i.e. poor quality) coal is widely used for household cooking and heating purposes by lower-income urban communities in South Africa. The smoke from the combustion of coal has had a severe impact on the health of society in the townships ...Read more