Before revision: Geography Where there is a substantial industrial urban population isolated from other conurbations, or when and where the growth in demand is so great that it becomes uneconomic or impractical for commercial organisations to provide, the municipalities concerned may assume functions necessary for the growth and functioning of the city .
After revision: Geography Where there is a substantial industrial urban population isolated from other conurbations, or when and where the growth in demand is so great that it becomes uneconomic or impractical for commercial organisations to provide, the municipalities concerned may assume functions necessary for the growth and functioning of the city