| in the way | 5 | location |
| in terms of energy use | 5 | other |
| generally | 4 | degree |
| economy → be → efficient | 19 |
| economy → be → more efficient | 11 |
| economy → become → more efficient | 8 |
| economy → become → efficient | 4 |
| negative | neutral | positive |
| 0.076 | 0.342 | 0.581 |
| Raw frequency | 42 |
| Normalized frequency | 0.553 |
| Modifier score | 0.500 |
| Perplexity | 390.819 |