| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| history of biosphere 2 | 1.04 | 0.1 | 2135 | 86 | 22 |
| history | 1.61 | 0.5 | 4987 | 9 | 7 |
| of | 1.1 | 0.6 | 8759 | 79 | 2 |
| biosphere | 0.55 | 0.9 | 6438 | 44 | 9 |
| 2 | 0.59 | 0.7 | 2231 | 44 | 1 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of biosphere 2 | 1.91 | 0.8 | 9201 | 20 |
| history of biosphere 1 | 1.53 | 0.6 | 9656 | 80 |
| biosphere 2 crew history | 1.74 | 0.8 | 3023 | 69 |
| who founded biosphere 2 | 1.38 | 0.7 | 4111 | 83 |
| what did biosphere 2 discover | 1.76 | 0.2 | 5607 | 56 |
| what was biosphere 2 | 1.59 | 0.9 | 5191 | 24 |
| when was the biosphere 2 built | 1.83 | 0.7 | 6799 | 26 |
| why biosphere 2 was originally built | 1.86 | 0.1 | 4791 | 45 |
| when was the original biosphere 2 mission | 0.01 | 0.2 | 8905 | 12 |
| what was the purpose of biosphere 2 | 1.06 | 0.8 | 3359 | 44 |
| picture of biosphere 2 | 0.14 | 0.5 | 6615 | 48 |
| images of biosphere 2 | 1.09 | 0.6 | 9879 | 1 |
| why did scientists build the biosphere 2 | 1.11 | 1 | 9162 | 67 |
| biosphere 1 and 2 | 1.79 | 0.4 | 2621 | 58 |
| books on biosphere 2 | 0.4 | 0.6 | 7220 | 36 |
| what happened to biosphere 2 | 0.68 | 1 | 3314 | 11 |
| the 2nd attempt at biosphere 2 was | 1.1 | 0.7 | 8244 | 14 |
| biosphere 2 experiment wiki | 0.75 | 0.5 | 7664 | 37 |
| biosphere 2 documentary film | 0.52 | 0.1 | 912 | 57 |
