| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| why air quality is declining | 0.33 | 0.4 | 9563 | 75 |
| why air quality is bad today | 1.25 | 0.5 | 97 | 36 |
| why is there poor air quality today | 1.73 | 0.5 | 5192 | 78 |
| why is air quality poor today | 0.08 | 0.3 | 3090 | 92 |
| why is there bad air quality today | 1.61 | 1 | 4671 | 33 |
| why air quality is worse in cities | 0.88 | 0.9 | 9988 | 83 |
| why is the air quality bad again | 0.52 | 1 | 8029 | 74 |
| why is the air quality poor | 0.55 | 0.1 | 7331 | 91 |
| what is affecting air quality today | 1.59 | 0.6 | 2580 | 7 |
| why does air quality change | 0.26 | 0.3 | 3852 | 74 |
| what is causing air quality to deteriorate | 0.57 | 0.9 | 3995 | 41 |
