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 and
Topic 2: Energy saving and Environmental Protection Technologies
Industrial energy conservation
Building energy efficiency
Civil energy conservation
Comprehensive utilization of resources
Solid waste treatment and disposal
Soil pollution control and remediation
Water ecological restoration and ecological protection
Pollution environmental monitoring
Air pollution prevention and control technology
Waste gas recovery and treatment technology
Topic 3: Materials
Environmental materials
Materials Science and Engineering
Nanomaterials
New energy materials
Biomaterials and biological devices
Optics
Electronic and magnetic materials
Composite, hybrid, and multifunctional materials
Metals and alloys
Environmentally friendly green materials
Nano porous materials
Polymer materials
Green catalytic chemistry
Photovoltaic materials
Silicon material
Material synthesis and processing technology
Basic Disciplines of Materials Science
Material surface and interface
Material Failure and Protection
Application of Nanotechnology in Rare Earth Elements
Theme 4: Ecological Architecture
Habitat reconstruction
Building energy-saving technology
Aesthetics and Landscape
Green construction, etc