(The following topics include but are not limited to)
Topic 1: Environmental Engineering
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
Topic 2: Renewable Energy
Thermal and Wind Energy Engineering
Nuclear Energy Engineering and Hydrogen Resources
Energy Materials and Energy Technology
Energy Security and Energy Systems
Energy Conversion and Energy Efficiency
Energy Analysis and Energy Transfer
Clean coal and fossil fuels
Biomass Energy Engineering
Energy Chemical Engineering
Energy saving lighting products and technologies
New energy vehicles
Oil and Gas Resources Engineering
Machines and equipment for resource processing
Hydroelectric power generation, geothermal and tidal power
Biogas and biomass energy
Hybrid energy system
New technologies for oil and gas development
Solar power
Wind power generation
Theme 3: Sustainable Development
Sustainable Energy and Environment
green manufacturing 
Agricultural sustainability
Zero energy buildings
Waste management
energy management
Energy Policy and Economy
Energy saving system
Sustainability of process industry
Energy Security and Clean Use
Green infrastructure