| AEC | Alternative energy carrier |
| AEM | Anion exchange membrane |
| BECCS | Bioenergy with carbon capture and storage |
| BOP | Balance of plant |
| Btu | British thermal units |
| CAES | Compressed air energy storage |
| CCS | Carbon capture and storage |
| CCUS | Carbon capture, utilization, and storage |
| CO2 | Carbon dioxide |
| CO2e | Carbon dioxide equivalent |
| CH4 | Methane |
| DAC | Direct air capture |
| DRI | Direct reduced iron |
| EAF | Electric arc furnace |
| EHS | Environmental health and safety |
| EPRI | Electric Power Research Institute |
| ESA | Endangered Species Act |
| EV | Electric vehicle |
| GHG | Greenhouse gas |
| Gt | Gigatonnes |
| GTI | GTI Energy |
| GW | Gigawatt |
| GWP | Global warming potential |
| HRSG | Heat recovery steam generator |
| H2 | Hydrogen |
| IEA | International Energy Agency |
| IPCC | Intergovernmental Panel on Climate Change |
| kWh | Kilowatt hour |
| kg | Kilogram |
| LCRI | Low-Carbon Resources Initiative |
| LDC | Local distribution company |
| MMt | Million metric tonnes |
| MMBtu | Million British thermal units |
| MW | Megawatt |
| NAAQS | National Ambient Air Quality Standards |
| N2O | Nitrous oxide |
| NOx | Nitrogen oxides |
| NZE | Net zero emissions |
| PEM | Proton exchange membrane |
| PSH | Pumped storage hydropower |
| PV | Photovoltaic |
| Quads | Quadrillion British thermal units |
| R&D | Research and development |
| RD&D | Research, development, and demonstration |
| RNG | Renewable natural gas |
| RICE | Reciprocating internal combustion engine |
| SIPS | State implementation plans |
| SF6 | Sulfur hexafluoride |
| SMR | Steam-methane reforming |
| SNG | Synthetic natural gas |
| SOEC | Solid oxide electrolysis |
| TAG | Technology Assessment Guide |
| TCN | Technical Collaboration Network |
| T&D | Transmission and distribution |
| TES | Thermal energy storage |
| TSC | Technical subcommittee |
| TWh | Terawatt hour |
| U.S. | United States |
| USD | United States dollar |
| USFWS | United States Fish and Wildlife Service |
| US-REGEN | U.S. Regional Economy, Greenhouse Gas, and Energy Model |
| Yr | Year |
