| Similarity | Rank | |
|---|---|---|
| afforestation | 0.772 | 25942 |
| silviculture | 0.771 | 72787 |
| biogeochemical | 0.766 | 71552 |
| urban-industrial | 0.762 | 73761 |
| ecosystem | 0.760 | 13337 |
| agroforestry | 0.759 | 56083 |
| reafforestation | 0.756 | 67737 |
| peatbog | 0.751 | 99210 |
| salinisation | 0.750 | 55212 |
| recolonisation | 0.749 | 97352 |
| geomorphological | 0.746 | 35722 |
| floristic | 0.745 | 47280 |
| hydrological | 0.743 | 33169 |
| pedological | 0.742 | 97874 |
| periglacial | 0.740 | 45595 |
| desertification | 0.739 | 27119 |
| species-rich | 0.736 | 57871 |
| siltation | 0.735 | 76239 |
| erosional | 0.735 | 46437 |
| fuelwood | 0.734 | 39541 |
| reforestation | 0.732 | 43916 |
| agronomic | 0.731 | 70382 |
| fluvial | 0.731 | 46476 |
| over-exploitation | 0.729 | 57939 |
| hydrology | 0.727 | 36871 |