| Similarity | Rank | |
|---|---|---|
| pollutant | 0.831 | 10281 |
| environmental | 0.744 | 1300 |
| pollute | 0.731 | 9638 |
| contamination | 0.728 | 7877 |
| groundwater | 0.725 | 12650 |
| polluter | 0.720 | 16007 |
| emission | 0.718 | 3620 |
| polluted | 0.717 | 13076 |
| ozone | 0.716 | 5037 |
| smog | 0.715 | 16818 |
| dioxin | 0.706 | 17452 |
| pesticide | 0.705 | 6857 |
| eutrophication | 0.703 | 42648 |
| depletion | 0.700 | 11015 |
| flooding | 0.694 | 10043 |
| hmip | 0.689 | 34570 |
| toxic | 0.689 | 5194 |
| overfishing | 0.688 | 60336 |
| sewage | 0.683 | 6966 |
| fallout | 0.681 | 25718 |
| deforestation | 0.672 | 16781 |
| hcfc | 0.672 | 89263 |
| over-grazing | 0.667 | 73877 |
| non-hazardous | 0.665 | 89624 |
| nox | 0.664 | 28969 |