| much | 5 | degree |
| in terms of the environment | 3 | other |
| domestically than diesel fuel | 2 | manner |
| gas → be → cleaner | 35 |
| gas → be → cleaner burning | 3 |
| negative | neutral | positive |
| 0.058 | 0.329 | 0.613 |
| Raw frequency | 38 |
| Normalized frequency | 0.456 |
| Modifier score | 0.500 |
| Perplexity | 129.563 |