| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| sources air pollution | 1.6 | 0.6 | 207 | 75 | 21 |
| sources | 0.25 | 0.2 | 8188 | 57 | 7 |
| air | 1.65 | 0.2 | 3882 | 2 | 3 |
| pollution | 1.93 | 0.4 | 3644 | 22 | 9 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| sources air pollution | 0.83 | 0.2 | 9884 | 42 |
| natural sources of air pollution | 1.22 | 0.3 | 3020 | 70 |
| sources of indoor air pollution | 1.22 | 0.7 | 8771 | 98 |
| what are the sources of air pollution | 1.49 | 0.1 | 2860 | 79 |
| major sources of air pollution | 1.69 | 0.7 | 1555 | 16 |
| what are the main sources of air pollution | 1.4 | 0.1 | 975 | 88 |
| stationary sources of air pollution | 1.79 | 0.8 | 5894 | 49 |
| natural sources of air pollution include | 0.85 | 0.2 | 2277 | 44 |
| natural sources of air pollution images | 0.64 | 0.3 | 5709 | 100 |
| natural sources of air pollution definition | 0.85 | 0.9 | 3950 | 60 |
| natural sources of air pollution examples | 1.24 | 0.6 | 5261 | 7 |
| natural and man made sources of air pollution | 1.37 | 0.5 | 7778 | 27 |
| 2 natural sources of air pollution | 0.06 | 0.4 | 9253 | 64 |
| what are the natural sources of air pollution | 1.5 | 0.4 | 4656 | 80 |
| what are two natural sources of air pollution | 1.66 | 0.8 | 3101 | 97 |
