Energy consumption Energy conservation 21 Environmental aspects 21 Economic aspects 8 Design and construction 7 Wireless sensor networks 7 Air conditioning 6 Industries 5 Buildings 4 Equipment and supplies 4 Exergy 4 Management 4 Sensor networks 4 Standards 4 Climatic factors 3 Data processing 3 Efficiency 3 Production management 3 Renewable energy sources 3 Wireless communication systems 3 Architecture and energy conservation 2 Biodiesel fuels 2 Carbon dioxide 2 Commercial buildings 2 Conservation 2 Costs 2 Dwellings 2 Electric power 2 Electric power consumption 2 Electric power production 2