| Similarity | Rank | |
|---|---|---|
| Environment | 0.840 | 7180 |
| Pollution | 0.821 | 29306 |
| Ecology | 0.819 | 24177 |
| Sustainability | 0.801 | 13996 |
| Sustainable | 0.796 | 11223 |
| Conservation | 0.794 | 8816 |
| Ecological | 0.784 | 34223 |
| Pesticide | 0.777 | 59962 |
| Biological | 0.776 | 20222 |
| Ecosystems | 0.768 | 73560 |
| Forestry | 0.765 | 23973 |
| Remediation | 0.763 | 67735 |
| Mitigation | 0.763 | 46446 |
| Climate | 0.761 | 8677 |
| Atmospheric | 0.759 | 35555 |
| Biodiversity | 0.746 | 33675 |
| Regulatory | 0.738 | 17510 |
| Stewardship | 0.737 | 30383 |
| Resources | 0.735 | 4807 |
| Assessment | 0.734 | 8922 |
| Protection | 0.734 | 5297 |
| Groundwater | 0.734 | 66053 |
| Hazardous | 0.733 | 38834 |
| Stormwater | 0.732 | 62618 |
| Impacts | 0.731 | 44421 |