| Similarity | Rank | |
|---|---|---|
| evaporation | 0.638 | 34012 |
| aquatic_ecosystem | 0.637 | 62506 |
| food_web | 0.606 | 46589 |
| terrestrial_ecosystem | 0.603 | 98125 |
| surface_water | 0.596 | 17620 |
| the_greenhouse_effect | 0.589 | 87706 |
| water_flow | 0.586 | 34701 |
| hydrology | 0.583 | 26128 |
| natural_system | 0.579 | 34720 |
| water_resource | 0.577 | 11673 |
| groundwater | 0.568 | 10207 |
| photosynthesis | 0.568 | 25448 |
| the_biosphere | 0.566 | 42448 |
| natural_ecosystem | 0.561 | 62077 |
| ecosystem_function | 0.559 | 92822 |
| natural_process | 0.558 | 47228 |
| water_management | 0.556 | 19218 |
| ground_water | 0.556 | 30977 |
| land_surface | 0.555 | 73962 |
| water_quality | 0.555 | 8567 |
| ocean_current | 0.554 | 74312 |
| desertification | 0.550 | 42512 |
| water_availability | 0.547 | 60520 |
| river_system | 0.546 | 55143 |
| aquifer | 0.546 | 20084 |