I. Advanced Renewable Energy (1–20)
- Next-generation solar photovoltaics
- Perovskite solar cells
- Transparent solar panels
- Space-based solar power
- High-altitude wind turbines
- Airborne wind energy systems
- Deep-ocean wind farms
- Wave energy converters
- Tidal stream generators
- Ocean thermal energy conversion (OTEC)
- Enhanced geothermal systems
- Supercritical geothermal energy
- Volcanic heat harvesting
- Desert solar mega-farms
- Floating solar arrays
- Bio-inspired solar leaves
- Artificial photosynthesis
- Solar paint coatings
- Urban building-integrated solar
- Hybrid renewable energy systems
II. Nuclear & Fusion Energy (21–40)
- Next-generation fission reactors (Gen IV)
- Small modular reactors (SMRs)
- Molten salt reactors
- Thorium-based reactors
- Fast breeder reactors
- Micro nuclear reactors
- Controlled nuclear fusion
- Tokamak fusion reactors
- Stellarator fusion systems
- Inertial confinement fusion
- Laser-driven fusion
- Magnetized target fusion
- Aneutronic fusion
- Fusion–fission hybrid systems
- Compact fusion devices
- Portable fusion energy units
- Advanced nuclear waste recycling reactors
- Accelerator-driven subcritical reactors
- Space-based nuclear reactors
- Nuclear battery technology
III. Hydrogen & Chemical Energy (41–60)
- Green hydrogen
- Blue hydrogen
- Turquoise hydrogen
- Solid hydrogen storage systems
- Ammonia-based energy
- Synthetic methane
- E-fuels (electrofuels)
- Liquid organic hydrogen carriers
- Metal hydride energy storage
- Hydrogen fuel cells
- Advanced lithium batteries
- Solid-state batteries
- Sodium-ion batteries
- Zinc-air batteries
- Flow batteries
- Graphene supercapacitors
- Bio-batteries
- Microbial fuel cells
- Carbon-neutral synthetic fuels
- Chemical looping energy systems
IV. Biological & Environmental Energy (61–80)
- Algae-based biofuel
- Engineered bacteria energy production
- Biohydrogen production
- Cellulose-based bioenergy
- Waste-to-energy systems
- Plastic-to-fuel conversion
- Biomass gasification
- Artificial tree energy harvesting
- Soil microbial energy
- Human kinetic energy harvesting
- Piezoelectric flooring systems
- Body heat energy conversion
- Thermoelectric generators
- Ambient heat harvesting
- Rain energy harvesting
- Lightning energy capture
- Atmospheric moisture energy
- Salinity gradient energy (blue energy)
- Urban waste heat recovery
- Carbon capture and energy reuse systems
V. Extreme & Far-Future Energy Concepts (81–100)
- Space-based solar satellites
- Asteroid resource energy systems
- Lunar-based helium-3 fusion
- Antimatter energy
- Dark matter energy extraction (theoretical)
- Zero-point energy (theoretical)
- Black hole energy harvesting (theoretical)
- Dyson sphere–type megastructures
- Vacuum energy concepts
- Quantum battery systems
- Artificial star energy reactors
- Gravitational energy harvesting
- Planetary rotation energy capture
- Magnetic field energy extraction
- High-efficiency wireless power transmission
- Global superconducting energy grids
- Self-healing smart energy networks
- Interplanetary energy systems
- Civilization-scale energy ecosystems
- Energy systems that co-evolve with humanity and AI
