Theme 1: Green Energy
Renewable energy engineering (solar energy, bioenergy, wind energy, nuclear energy, hydrogen energy, etc.)
Traditional energy engineering (traditional electricity such as coal, oil, natural gas, etc.)
Energy materials
Energy storage technology
Energy saving technology
Energy and Chemical Industry
Energy Security and Clean Utilization
Hazardous solid waste management
Sustainability of Society and Environment
Energy equipment and technology
Thermophysics and Thermal Energy Engineering
Clean energy technology
Energy storage technology
Green energy development technology
Natural gas hydrate development technology
Renewable energy development technology
Geothermal and hydrogen energy development technology
Energy saving technology
Thermal and Power Engineering
Clean Development Mechanism 
Thermal, Hydraulic, and Safety Analysis of Nuclear Reactors
Non steady state thermodynamics
Topic 2: Environment
Pollution control
Ecosystem management
Solid waste management
Environmental Management
Water resources management
Wastewater discharge management
Water quality modeling
Environmental Nanotechnology
Geographic Information Systems, Statistics, and Remote Sensing
Environmental remote sensing applications
GIS is used for environmental assessment
Wastewater and sludge treatment
Water treatment and reclamation
Industrial wastewater treatment
Wetland for wastewater treatment
Ecosystem restoration
Biological filtration of harmful gases
Soil remediation/plant remediation
Theme 3: Renewable Energy
Air quality assessment
Biofuels/Biofuel Cells
Ecosystem assessment
Ecosystem restoration
Energy policy, planning, and management
Energy saving
Energy conversion
Energy efficiency
Environmental process simulation
Environmental remote sensing applications
Geothermal environment assessment
Biological filtration of harmful gases
Hybrid energy system
Hydropower
Hydrogen and fuel cell technology
Nuclear fission and fusion
Renewable energy
Solar energy
Solid waste management
Sustainable Development Education
Hydropower
Wind energy
Wastewater and sludge treatment
Water treatment and recycling