| Similarity | Rank | |
|---|---|---|
| over-grazing | 0.700 | 73877 |
| spoilage | 0.700 | 78925 |
| salinisation | 0.698 | 55212 |
| desertification | 0.697 | 27119 |
| insect-bear | 0.688 | 99420 |
| erosion | 0.688 | 5070 |
| biogeochemical | 0.687 | 71552 |
| decomposition | 0.684 | 17616 |
| overgrazing | 0.680 | 43790 |
| depletion | 0.680 | 11015 |
| degrade | 0.676 | 11631 |
| contamination | 0.675 | 7877 |
| waterlogging | 0.674 | 41903 |
| eutrophication | 0.673 | 42648 |
| over-population | 0.673 | 56522 |
| siltation | 0.671 | 76239 |
| organo-chloride | 0.671 | 97671 |
| acidification | 0.670 | 21870 |
| photochemical | 0.661 | 30345 |
| senescence | 0.656 | 34799 |
| deterioration | 0.651 | 7104 |
| peatbog | 0.651 | 99210 |
| ecosystem | 0.649 | 13337 |
| irreversible | 0.649 | 13445 |
| malnutrition | 0.648 | 16542 |