Municipal refuse. Solid wastes Environmental protection 2 Sanitary landfills 2 Consumer behavior. Consumers' preferences. Consumer research. Including consumer profiling 1 Enviromental management 1 Environmental pollution 1 Food service 1 HT Communities. Classes. Races 1 Industrial research. Research and development 1 Islam and culture 1 Law enforcement 1 Malaysia 1 Refuse and refuse disposal 1 Restaurants, cafeterias, tearooms, etc 1 Rural and farm sanitary engineering 1 Sewage collection and disposal systems. Sewerage 1 TD Environmental technology. Sanitary engineering 1