| methane → HasA → carbon | 0.43 | |
| methane → HasA → large effect | 0.40 | |
| methane → HasA → short lifetime | 0.39 | |
| methane → HasA → a global warming potential | 0.36 | |
| methane → HasA → greater effect | 0.34 | |
| methane → HasA → half life of seven years | 0.30 | |
| methane → HasA → immediate effect | 0.25 | |
| methane → HasA → lower vapor pressure | 0.25 | |
| methane → HasA → many sources | 0.25 |