| from reducing energy | 4 | purpose |
| to maintaining a sustainable future | 3 | purpose |
| recycling → be → key | 7 |
| recycling → be → one of the keys | 5 |
| recycling → be → the key | 4 |
| negative | neutral | positive |
| 0.033 | 0.445 | 0.522 |
| Raw frequency | 16 |
| Normalized frequency | 0.322 |
| Modifier score | 0.500 |
| Perplexity | 23.043 |