| Similarity | Rank | |
|---|---|---|
| environmental_problem | 0.738 | 25380 |
| global_challenge | 0.726 | 41446 |
| environmental_issue | 0.661 | 11632 |
| environmental_degradation | 0.656 | 26308 |
| environmental_crisis | 0.645 | 74211 |
| environmental_concern | 0.638 | 27548 |
| global_problem | 0.628 | 66690 |
| economic_challenge | 0.623 | 92616 |
| climate_change | 0.616 | 1527 |
| sustainability_issue | 0.608 | 67594 |
| these_challenge | 0.607 | 16957 |
| environmental_change | 0.604 | 25132 |
| water_scarcity | 0.602 | 48604 |
| global_climate_change | 0.599 | 29854 |
| global_issue | 0.590 | 34072 |
| loss_of_biodiversity | 0.589 | 94363 |
| environmental_risk | 0.589 | 55873 |
| environmental_pollution | 0.589 | 52695 |
| the_effect_of_climate_change | 0.586 | 44525 |
| biodiversity_loss | 0.586 | 86453 |
| climate_change_impact | 0.585 | 52284 |
| address_climate_change | 0.584 | 69629 |
| a_change_climate | 0.582 | 77526 |
| sustainable_development | 0.580 | 5196 |
| health_challenge | 0.579 | 91517 |