| Similarity | Rank | |
|---|---|---|
| climate_Change | 0.681 | 9291 |
| Ecosystems | 0.666 | 55203 |
| global_change | 0.655 | 38598 |
| Biodiversity | 0.644 | 16460 |
| on_climate_Change | 0.641 | 55796 |
| Environmental_Policy | 0.621 | 79363 |
| Sustainable_Development | 0.614 | 30275 |
| Hydrology | 0.613 | 99226 |
| Sustainability | 0.610 | 11115 |
| and_Sustainable_Development | 0.603 | 47267 |
| global_climate | 0.597 | 53875 |
| Environmental_Science | 0.591 | 32182 |
| Remote_Sensing | 0.590 | 43967 |
| for_Sustainable_Development | 0.589 | 98709 |
| Ecology | 0.584 | 19589 |
| Environmental_Studies | 0.578 | 44458 |
| climate_change | 0.566 | 1527 |
| Meteorology | 0.566 | 96252 |
| climate_variability | 0.562 | 91277 |
| global_climate_change | 0.561 | 29854 |
| Food_Security | 0.560 | 36768 |
| Global | 0.559 | 7273 |
| Earth_Science | 0.557 | 63155 |
| Water_Resources | 0.555 | 38831 |
| Environmental | 0.555 | 12483 |