| Typicality: | 0.485 |
| Saliency: | 0.754 |
| of fossil fuels | 9 | other |
| with the least environmental impact | 3 | other |
| environmentally | 2 | manner |
| natural gas → be → the cleanest burning fossil fuel | 27 |
| natural gas → be → the cleanest fossil fuel | 24 |
| natural gas → be → cleanest-burning fossil fuel | 11 |
| natural gas → be → the cleanest of fossil fuels | 7 |
| natural gas → be → the cleanest fuel | 3 |
| negative | neutral | positive |
| 0.026 | 0.255 | 0.719 |
| Raw frequency | 72 |
| Normalized frequency | 0.754 |
| Modifier score | 0.500 |
| Perplexity | 11.004 |