Theme 1: Ecological and Environmental Protection
Environmental remediation
Carbon neutrality
Carbon peak
Residual temperature collection
Energy efficiency 
Low carbon technology
Waste recycling and utilization
Comprehensive utilization of resources
Environmental science
Resource integration
Green lighting
Circulatory system
Topic 2: Pollution Prevention and Control
Emerging pollutants
Advanced oxidation process
Pollution control projects (air, water, solids)
Garbage disposal and recycling
Clean production process
Soil pollution and remediation
Clean technology
Environmental safety and health
Biodegradation of harmful substances
Wastewater and sludge treatment
Handling of Hazardous Substances
Air pollution and treatment
Groundwater management
Water pollution and its control
Emission source management
Hazardous Solid Management
Monitoring and analysis of environmental pollutants
Interactions between pollutants
Technical aspects of treatment and disposal methods (landfill, heat treatment, etc.)
Disinfection and management of water treatment residues
Topic 3: Clean Energy
Renewable energy technologies and systems
Renewable energy storage technology
Energy efficiency 
Solar thermal energy
Solar powered seawater desalination
Solar energy materials
Photovoltaic and wind energy technology
Hydrogen energy production
Hydrogen storage
Fuel cell
Biomass and biofuels
Waste to energy conversion
Nuclear energy
Energy management
Energy security and clean utilization
Energy management control system
Bioenergy
Passive solar building 
Sustainable architecture
Energy and Architecture
Economic feasibility of renewable energy systems