| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| clean air act amendments of 1990 pdf | 0.34 | 0.3 | 3394 | 22 | 36 |
| clean | 1.34 | 0.6 | 7197 | 59 | 5 |
| air | 0.31 | 0.9 | 819 | 35 | 3 |
| act | 1.16 | 0.9 | 624 | 38 | 3 |
| amendments | 0.62 | 0.4 | 8419 | 64 | 10 |
| of | 0.47 | 0.4 | 7475 | 8 | 2 |
| 1990 | 0.83 | 0.9 | 5222 | 50 | 4 |
| 0.45 | 0.2 | 6589 | 67 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| clean air act amendments of 1990 pdf | 0.05 | 0.1 | 415 | 80 |
