| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| what are the six criteria air pollutants | 0.71 | 0.7 | 5565 | 65 | 40 |
| what | 0.93 | 0.8 | 9934 | 81 | 4 |
| are | 0.01 | 0.7 | 9161 | 19 | 3 |
| the | 0.75 | 0.1 | 4667 | 82 | 3 |
| six | 1.47 | 0.1 | 5200 | 58 | 3 |
| criteria | 1 | 0.2 | 2901 | 58 | 8 |
| air | 0.2 | 1 | 9793 | 90 | 3 |
| pollutants | 0.26 | 0.2 | 3989 | 77 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what are the six criteria air pollutants | 0.75 | 0.6 | 7356 | 65 |
| six criteria air pollutants | 0.24 | 0.8 | 3336 | 97 |
| epa six criteria air pollutants | 1.75 | 0.5 | 3623 | 26 |
| six criteria pollutants clean air act | 0.83 | 0.6 | 3043 | 49 |
| what are the criteria air pollutants | 0.19 | 0.1 | 567 | 63 |
| what are the 6 criteria pollutants | 1.52 | 0.6 | 5035 | 79 |
| the six criteria pollutants | 0.97 | 0.1 | 6638 | 83 |
| air quality criteria pollutants | 0.01 | 0.4 | 2313 | 61 |
| criteria air pollutants epa | 0.21 | 0.6 | 2838 | 16 |
| list of criteria pollutants | 1.08 | 0.8 | 7465 | 77 |
| criteria air pollutants definition | 0.82 | 0.4 | 2561 | 91 |
| clean air act 6 criteria pollutants | 1.12 | 0.7 | 8661 | 60 |
| epa 6 criteria pollutants | 1.47 | 0.5 | 7559 | 34 |
