| Similarity | Rank | |
|---|---|---|
| change_environment | 0.683 | 46370 |
| in_the_[number]_st_century | 0.634 | 51849 |
| future_challenge | 0.585 | 41206 |
| global_society | 0.576 | 84854 |
| fast_change | 0.576 | 74885 |
| global_challenge | 0.575 | 41446 |
| a_global_economy | 0.574 | 75589 |
| change_nature_of | 0.565 | 49268 |
| global_environment | 0.561 | 57161 |
| new_reality | 0.558 | 46693 |
| change_climate | 0.555 | 70307 |
| rapidly_change | 0.553 | 62591 |
| today_world | 0.539 | 51147 |
| global_change | 0.531 | 38598 |
| the_[number]_st_century | 0.527 | 85770 |
| global_context | 0.526 | 65964 |
| in_the_twenty-first_century | 0.524 | 56594 |
| the_world_we_live_in | 0.522 | 55460 |
| [number]_st_century | 0.522 | 86272 |
| a_change_climate | 0.520 | 77526 |
| the_modern_world | 0.520 | 25633 |
| global_economy | 0.518 | 42080 |
| rapid_change | 0.516 | 68895 |
| contemporary_issue | 0.503 | 75349 |
| constant_change | 0.502 | 80900 |