| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| history of landfill engineering | 0.65 | 0.2 | 2697 | 17 | 31 |
| history | 0.29 | 1 | 8326 | 25 | 7 |
| of | 1.51 | 0.6 | 8606 | 69 | 2 |
| landfill | 1.81 | 0.5 | 3519 | 85 | 8 |
| engineering | 0.07 | 0.8 | 1265 | 20 | 11 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of landfill engineering | 0.78 | 0.1 | 7179 | 77 |
