| Similarity | Rank | |
|---|---|---|
| biodiesel | 0.799 | 34972 |
| renewable_fuel | 0.797 | 88540 |
| biofuel | 0.767 | 11346 |
| hybrid_vehicle | 0.737 | 71174 |
| electric_vehicle | 0.725 | 16350 |
| alternative_energy_source | 0.724 | 77620 |
| alternative_energy | 0.704 | 32265 |
| liquid_fuel | 0.681 | 86707 |
| fuel_cell | 0.681 | 19021 |
| CNG | 0.681 | 58832 |
| natural_gas | 0.675 | 5419 |
| renewable_energy_source | 0.673 | 24016 |
| renewable_energy | 0.666 | 4106 |
| hybrid_car | 0.663 | 85459 |
| fuel_efficiency | 0.658 | 45499 |
| internal_combustion_engine | 0.651 | 72067 |
| electric_car | 0.648 | 17957 |
| bioga | 0.648 | 33090 |
| renewable_energy_technology | 0.646 | 55947 |
| diesel | 0.643 | 12206 |
| fossil_fuel | 0.640 | 9239 |
| diesel_fuel | 0.635 | 48281 |
| of_fossil_fuel | 0.635 | 44531 |
| hydrogen | 0.634 | 10438 |
| renewable_source | 0.632 | 75160 |