Tier 1: Clean Energy |
|---|
Tier 2 | Tier 3 |
Biomass | |
Fuel Cells | - Direct Methanol Fuel Cell
- Molten Carbonate Fuel Cell
- Proton Exchange Membrane Fuel Cell
- Solid Oxide Fuel Cell
- Zinc Air Fuel Cell
|
Geothermal | - Hot Dry Rock Enhanced
- Natural Aquifer
|
Marine | - Ocean Thermal
- Run-of-River (and other small-scale hydro)
- Tidal
- Wave
|
Nuclear
| - Fusion
- New Fission Designs
- Non-Uranium Fuels
- Waste Disposal
|
Renewable Fuels | - Biobutanol
- Biodiesel
- Biogas
- Cellulosic Ethanol
- Drop-in Synthetic Fuels
- Ethanol
- Hydrogen (when produced from non-fossil sources)
- Methanol
|
Solar | - Concentrated Solar Power
- Crystalline Silicon
- Financing Providers
- Inverters
- Other Emerging Photovoltaic
- Photovoltaic Module Technologies
- Systems
- Thermal
- Thin Film
|
Waste-to-Energy | - Anaerobic Digestion
- Gasification
- Landfill Gas
- Plasma Torching
- Waste Heat Recovery
|
Wind | |
