| as carbon dioxide | 16 | other |
| over a 100-year timeframe | 12 | temporal |
| as a greenhouse gas | 6 | manner |
| methane → be → potent | 46 |
| methane → be → powerful | 17 |
| negative | neutral | positive |
| 0.364 | 0.497 | 0.139 |
| Raw frequency | 63 |
| Normalized frequency | 0.645 |
| Modifier score | 0.500 |
| Perplexity | 140.606 |