| cause asthma | 0.40 |
| cause acid rain | 0.37 |
| cause cancer | 0.23 |
| extend into recent past | 0.16 |
| kill 7 million people | 0.16 |
| affect everyone | 0.16 |
| exceed eu-wide norm | 0.16 |
| cause respiratory disea… | 0.16 |
| reduced | 0.45 |
| linked to delay | 0.42 |
| anticipated to endanger… | 0.40 |
| produced | 0.37 |
| considered safe | 0.25 |
| produced by massive bur… | 0.16 |