| Similarity | Rank | |
|---|---|---|
| geothermal | 0.880 | 21905 |
| Renewable | 0.806 | 19768 |
| Biomass | 0.794 | 50798 |
| Energy | 0.793 | 2769 |
| Solar | 0.776 | 7195 |
| Gas | 0.767 | 8205 |
| Renewables | 0.757 | 55257 |
| Heating | 0.754 | 20354 |
| Heaters | 0.752 | 66548 |
| Energy's | 0.749 | 41046 |
| Turbines | 0.746 | 90319 |
| Photovoltaic | 0.743 | 65567 |
| Cooling | 0.735 | 31879 |
| Heater | 0.730 | 46965 |
| Electricity | 0.726 | 20930 |
| cogeneration | 0.723 | 76666 |
| Thermal | 0.721 | 25485 |
| NREL | 0.716 | 96585 |
| gas-fired | 0.716 | 70372 |
| Groundwater | 0.716 | 66053 |
| Propane | 0.711 | 57643 |
| gasification | 0.705 | 64900 |
| Biofuels | 0.702 | 67613 |
| Methane | 0.697 | 69623 |
| Efficiency | 0.697 | 18898 |