| Similarity | Rank | |
|---|---|---|
| atrazine | 0.872 | 78097 |
| overfishing | 0.863 | 60336 |
| over-grazing | 0.860 | 73877 |
| overgrazing | 0.857 | 43790 |
| salinisation | 0.851 | 55212 |
| peatbog | 0.833 | 99210 |
| waterlogging | 0.824 | 41903 |
| acidification | 0.820 | 21870 |
| siltation | 0.816 | 76239 |
| fumigant | 0.812 | 99638 |
| insect-bear | 0.811 | 99420 |
| rangeland | 0.810 | 74004 |
| organochlorine | 0.809 | 48475 |
| leachate | 0.804 | 84487 |
| lindane | 0.803 | 67136 |
| spoilage | 0.802 | 78925 |
| shallow-water | 0.800 | 88599 |
| aldrin | 0.799 | 81928 |
| organophosphate | 0.796 | 84664 |
| biogeochemical | 0.795 | 71552 |
| coliform | 0.793 | 95968 |
| ergot | 0.790 | 86093 |
| nitrogen-fixing | 0.788 | 66398 |
| bioga | 0.787 | 50706 |
| afforestation | 0.786 | 25942 |