| Similarity | Rank | |
|---|---|---|
| Environmental | 0.751 | 12483 |
| and_Sustainable_Development | 0.714 | 47267 |
| Ecology | 0.709 | 19589 |
| Environmental_Protection | 0.702 | 42428 |
| Natural_Resources | 0.701 | 20910 |
| Sustainability | 0.694 | 11115 |
| and_Natural_Resources | 0.693 | 30420 |
| Environmental_Management | 0.676 | 46550 |
| climate_Change | 0.662 | 9291 |
| Environments | 0.660 | 60650 |
| Pollution | 0.658 | 67166 |
| Infrastructure | 0.657 | 15425 |
| Water_Resources | 0.655 | 38831 |
| Economy | 0.651 | 12797 |
| Energy | 0.648 | 3952 |
| Resource_Management | 0.648 | 68724 |
| Ecosystems | 0.642 | 55203 |
| Environmental_Policy | 0.640 | 79363 |
| Sustainable_Development | 0.634 | 30275 |
| Environmental_Science | 0.634 | 32182 |
| Environmental_Health | 0.629 | 41154 |
| Biodiversity | 0.621 | 16460 |
| Urban_Development | 0.610 | 94115 |
| Health | 0.609 | 1920 |
| Air_Quality | 0.605 | 61690 |