| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| natural gas vehicle emissions | 1.31 | 0.7 | 8547 | 75 | 29 |
| natural | 0.39 | 0.7 | 4998 | 70 | 7 |
| gas | 1.21 | 0.5 | 7812 | 20 | 3 |
| vehicle | 1.02 | 0.7 | 7783 | 43 | 7 |
| emissions | 1.81 | 0.3 | 8731 | 76 | 9 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| natural gas vehicle emissions | 0.91 | 0.5 | 22 | 32 |
| compressed natural gas cars emissions | 0.67 | 0.6 | 1701 | 23 |
| emissions from natural gas | 0.84 | 0.5 | 1490 | 24 |
| natural gas carbon emissions | 1.15 | 0.6 | 70 | 2 |
| gas emissions from vehicles | 0.95 | 0.4 | 5978 | 69 |
| natural gas combustion emissions | 0.28 | 1 | 6319 | 47 |
| natural gas fuel cell emissions | 0.9 | 0.6 | 6531 | 36 |
| gas powered car emissions | 1.07 | 0.1 | 7965 | 74 |
| natural gas greenhouse gas emissions | 0.99 | 0.4 | 9701 | 39 |
| emissions of gas cars | 1.44 | 0.3 | 4025 | 86 |
| greenhouse gas vehicle emissions | 0.96 | 1 | 5116 | 77 |
| natural gas emissions factor | 1.61 | 0.6 | 2540 | 14 |
| natural gas burning emissions | 0.76 | 0.4 | 320 | 30 |
| renewable natural gas emissions | 0.82 | 0.5 | 7693 | 50 |
| natural gas ghg emissions | 1.62 | 0.7 | 612 | 96 |
| natural gas emission systems | 0.95 | 0.8 | 8874 | 36 |
| greenhouse gas emissions from vehicles | 0.14 | 0.4 | 7077 | 76 |
