| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| what are criteria air pollutants | 0.86 | 0.4 | 9080 | 18 | 32 |
| what | 1.85 | 0.7 | 851 | 83 | 4 |
| are | 1.71 | 0.6 | 8879 | 12 | 3 |
| criteria | 1.63 | 0.3 | 7589 | 49 | 8 |
| air | 1.4 | 1 | 5713 | 50 | 3 |
| pollutants | 1 | 1 | 2595 | 67 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what are criteria air pollutants | 1.07 | 0.3 | 763 | 41 |
| criteria air pollutants | 0.79 | 0.6 | 7929 | 17 |
| criteria air pollutants definition | 0.82 | 0.9 | 1259 | 7 |
| six criteria air pollutants | 0.62 | 0.9 | 4725 | 63 |
| 6 criteria air pollutants | 0.58 | 0.5 | 6237 | 89 |
| epa criteria air pollutants | 1.45 | 0.3 | 2826 | 26 |
| what are the 6 criteria air pollutants | 0.75 | 0.2 | 1107 | 68 |
| criteria air pollutants epa | 1.57 | 0.5 | 1410 | 93 |
| criteria air pollutants list | 0.82 | 0.3 | 268 | 4 |
| criteria air pollutants include | 1.25 | 0.3 | 7078 | 81 |
| criteria air pollutants in india | 0.72 | 0.3 | 5465 | 13 |
| criteria air pollutants clean air act | 1.26 | 0.6 | 4301 | 84 |
| clean air act criteria pollutants | 1.96 | 0.3 | 1970 | 92 |
| 6 criteria pollutants in the clean air act | 1.88 | 0.6 | 1504 | 31 |
