| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what is smog caused by | 2 | 0.4 | 1331 | 44 |
| smog is caused by | 0.1 | 0.1 | 5757 | 65 |
| what caused the great smog of london | 1.53 | 0.7 | 3720 | 80 |
| what caused the great smog of london 1952 | 0.38 | 0.2 | 9666 | 99 |
| what caused the london smog | 1.83 | 0.4 | 7708 | 75 |
| what caused the donora smog | 1.29 | 0.1 | 494 | 49 |
| diseases caused by smog | 0.02 | 0.1 | 293 | 6 |
| smog causes | 0.07 | 0.8 | 9353 | 96 |
| smog by rita escondido | 0.95 | 0.5 | 4652 | 89 |
| smog bytom | 1.68 | 0.1 | 6297 | 37 |
| smog causes and effects | 0.54 | 0.2 | 1958 | 100 |
| smog bypass | 1.73 | 0.1 | 5404 | 41 |
| smog bydgoszcz | 1.08 | 0.5 | 8040 | 5 |
| smog by rita | 1.07 | 0.5 | 7204 | 8 |
| smog by vin | 0.37 | 0.8 | 7024 | 16 |
| smog by city | 0.96 | 0.8 | 1450 | 62 |
| smog by state | 1.31 | 0.6 | 6713 | 52 |
