| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| co2 levels in atmosphere by year | 1.67 | 0.9 | 1054 | 3 | 32 |
| co2 | 0.91 | 0.2 | 2403 | 74 | 3 |
| levels | 0.48 | 0.9 | 7482 | 23 | 6 |
| in | 1.86 | 0.2 | 3987 | 47 | 2 |
| atmosphere | 0.24 | 1 | 2659 | 54 | 10 |
| by | 1.8 | 0.6 | 9700 | 7 | 2 |
| year | 0.43 | 0.5 | 8342 | 92 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| co2 levels in atmosphere by year | 1.96 | 0.3 | 6359 | 17 |
