| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| history of landfill gas | 0.86 | 0.7 | 171 | 18 | 23 |
| history | 0.52 | 0.3 | 9091 | 73 | 7 |
| of | 0.18 | 0.7 | 9745 | 62 | 2 |
| landfill | 1.57 | 0.4 | 9760 | 57 | 8 |
| gas | 0.46 | 0.8 | 1035 | 64 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of landfill gas | 1.53 | 0.9 | 5975 | 76 |
