Air pollution and its control 5 TD Environmental technology. Sanitary engineering 4 Environmental conditions. Environmental quality. Environmental indicators. Environmental degradation 3 Environmental pollution 3 Malaysia 3 Algorithms 2 Detectors. Sensors. Sensor networks 2 Environmental protection 2 Qualities of water. Water quality 2 Applications of electronics 1 Architecture in relation to special subjects 1 Bacterial toxins 1 Client/server computing 1 Computer software 1 Engineering geology. Rock mechanics. Soil mechanics 1 English language 1 Entrepreneurship. Risk and uncertainty 1 Enviromental management 1 Environmental auditing 1 Environmental engineering 1 Environmentalism. Green movement 1 Harbors. Ports. Including port districts, docks, wharves, traffic control 1 Indoor air pollution. Including indoor air quality 1 Industrial sociology. Social conditions of labor 1 Labor market. Labor supply. Labor demand, Including unemployment, manpower policy, occupational training, employment agencies 1 Management information systems 1 Management. Industrial Management 1 Multivariate analysis. Cluster analysis. Longitudinal method 1 Municipal refuse. Solid wastes 1 NA Architecture 1