• Advanced Renewable Energy Technologies
• High-efficiency photovoltaic materials and devices
• Floating offshore wind turbine design and optimization
• Next-generation geothermal heat extraction systems
• Tidal and wave energy conversion technologies
• Bioenergy from algae and organic waste
• Perovskite solar cells: stability and scalability
• Concentrated solar power (CSP) with thermal storage
• Small-scale hydropower innovations for rural areas
• Hydrogen production via electrolysis from renewable sources
• Hybrid renewable energy systems: design and control
• Energy harvesting from ambient sources (vibration, RF, thermal)
• Renewable energy forecasting using AI and big data
• Bifacial and building-integrated photovoltaics (BIPV)
• Vertical axis wind turbines for urban environments
• Advanced battery technologies for renewable integration
• Renewable synthetic fuels (e-fuels) production
• Solar thermal cooling and heating systems
• Energy storage in phase change materials (PCM)
• Thermoelectric generators for waste heat recovery
• Emerging nanomaterials for renewable energy applications

• Environmental Engineering
• Low-cost air quality monitoring networks
• Biofiltration for volatile organic compound removal
• Advanced oxidation processes for water treatment
• Membrane bioreactors for municipal wastewater reuse
• Soil remediation using phytoremediation techniques
• Microplastic detection and removal from aquatic systems
• Electrocoagulation for industrial effluent treatment
• Adsorption of heavy metals using biochar
• Landfill leachate treatment technologies
• Constructed wetlands for decentralized wastewater treatment
• Nanotechnology for environmental pollutant sensing
• Acid mine drainage remediation using passive systems