| separately | 3 | manner |
| around the world | 2 | location |
| more easily | 2 | manner |
| methane → be → stored | 15 |
| methane → be stored in → the ground | 3 |
| negative | neutral | positive |
| 0.222 | 0.694 | 0.084 |
| Raw frequency | 18 |
| Normalized frequency | 0.380 |
| Modifier score | 1.000 |
| Perplexity | 282.042 |