| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| biosphere 2 failed experiment | 0.95 | 0.4 | 4361 | 82 | 29 |
| biosphere | 0.16 | 1 | 951 | 48 | 9 |
| 2 | 0.34 | 0.6 | 2178 | 58 | 1 |
| failed | 0.32 | 0.5 | 4232 | 11 | 6 |
| experiment | 0.34 | 0.5 | 4536 | 79 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| biosphere 2 failed experiment | 1.36 | 0.7 | 2789 | 19 |
| why biosphere 2 failed | 1.59 | 1 | 6931 | 7 |
| why did biosphere 2 fail | 1.82 | 1 | 7316 | 88 |
| biosphere 2 experiment wiki | 1.89 | 0.9 | 1107 | 44 |
| why was biosphere 2 a failure | 0.71 | 1 | 7242 | 8 |
| biosphere 2 what went wrong | 1 | 0.1 | 2923 | 47 |
| what happened to biosphere 2 | 1.67 | 0.6 | 2514 | 90 |
| biosphere 2 what really happened | 0.33 | 0.8 | 1048 | 18 |
| the 2nd attempt at biosphere 2 was | 1.61 | 1 | 3888 | 94 |
| why did scientists build the biosphere 2 | 0.59 | 0.1 | 3058 | 13 |
| what happened to biosphere 1 | 0.06 | 0.2 | 5958 | 3 |
| closed biosphere human experiment | 1.31 | 0.9 | 9990 | 98 |
| what happened to biosphere | 0.02 | 1 | 746 | 100 |
| history of biosphere 2 | 0.29 | 0.1 | 8746 | 47 |
| biosphere 2 crew experiments | 0.33 | 0.4 | 2343 | 44 |
| why was biosphere 2 built | 0.28 | 0.8 | 4728 | 2 |
| what did biosphere 2 discover | 1.83 | 0.6 | 3172 | 48 |
| books on biosphere 2 | 0.89 | 0.2 | 3710 | 12 |
| why biosphere 2 was originally built | 0.59 | 1 | 4836 | 42 |
| biosphere 1 and 2 | 0.35 | 0.6 | 8275 | 89 |
| is biosphere 2 still open | 1.17 | 1 | 9530 | 53 |
| what was biosphere 2 | 0.99 | 0.4 | 4748 | 65 |
| biosphere 2 documentary film | 1.91 | 1 | 8654 | 24 |
