| Similarity | Rank | |
|---|---|---|
| ecological | 0.839 | 9588 |
| sustainability | 0.784 | 5513 |
| pollution | 0.773 | 5841 |
| biodiversity | 0.748 | 13376 |
| land-use | 0.747 | 46372 |
| conservation | 0.747 | 4776 |
| impacts | 0.746 | 5402 |
| water-related | 0.745 | 83580 |
| ecology | 0.732 | 15032 |
| climate-change | 0.729 | 93307 |
| Environmental | 0.724 | 4967 |
| mitigation | 0.720 | 14953 |
| climate | 0.717 | 2178 |
| toxics | 0.715 | 88988 |
| anthropogenic | 0.699 | 46957 |
| energy-related | 0.698 | 86604 |
| ecosystems | 0.692 | 13909 |
| sustainable | 0.688 | 3070 |
| transboundary | 0.687 | 87423 |
| science-based | 0.682 | 50054 |
| desertification | 0.682 | 69099 |
| communities' | 0.681 | 77538 |
| hydrology | 0.681 | 60846 |
| hydrological | 0.680 | 62436 |
| environmentalism | 0.678 | 50542 |