| from natural gas | 12 | other |
| from water | 10 | other |
| from renewable energy sources | 9 | other |
| hydrogen → be → generated | 101 |
| hydrogen → be → manufactured | 27 |
| hydrogen → be generated in → addition | 8 |
| hydrogen → be produced for → example | 4 |
| hydrogen → be made for → example | 3 |
| negative | neutral | positive |
| 0.140 | 0.627 | 0.233 |
| Raw frequency | 143 |
| Normalized frequency | 0.718 |
| Modifier score | 0.480 |
| Perplexity | 493.762 |