| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| is co2 lighter than air | 0.87 | 0.7 | 5658 | 15 |
| is co2 lighter than air and will rise | 1.65 | 0.8 | 506 | 96 |
| is co2 heavier than air or lighter | 1.17 | 0.9 | 6265 | 64 |
| is carbon dioxide lighter than air | 0.18 | 0.2 | 3489 | 37 |
| is co2 lighter than oxygen | 0.27 | 0.9 | 1736 | 28 |
| carbon dioxide lighter or heavier than air | 1.02 | 0.7 | 657 | 11 |
| does co2 rise or fall in air | 1.46 | 0.9 | 2421 | 39 |
| is co lighter than air | 0.54 | 0.7 | 1689 | 37 |
| co2 is heavier than air | 0.15 | 0.5 | 4235 | 4 |
| is co lighter than air or heavier | 0.7 | 0.9 | 3652 | 53 |
| is co2 heavy than air | 1.84 | 0.3 | 2002 | 62 |
| is carbon dioxide lighter than oxygen | 1.78 | 0.6 | 8672 | 56 |
| are co2 levels higher than ever | 1.75 | 0.9 | 5592 | 81 |
| does co2 rise or fall | 0.8 | 0.3 | 8259 | 64 |
| more co2 in the atmosphere | 1.49 | 0.2 | 2708 | 80 |
