| natural gas → IsA → a fossil fuel | 0.71 | |
| natural gas → IsA → fuel | 0.65 | |
| natural gas → IsA → a greenhouse gas | 0.61 | |
| natural gas → IsA → gas | 0.57 | |
| natural gas → IsA → a bridge fuel | 0.53 | |
| natural gas → IsA → the cleanest burning fossil fuel | 0.48 | |
| natural gas → IsA → clean fuel | 0.43 | |
| natural gas → IsA → powerful greenhouse gas | 0.42 | |
| natural gas → IsA → finite resource | 0.42 | |
| natural gas → IsA → primary fuel | 0.40 | |
| natural gas → IsA → the fuel of choice | 0.40 | |
| natural gas → IsA → a transition fuel | 0.37 | |
| natural gas → IsA → non-renewable resource | 0.36 | |
| natural gas → IsA → gaseous fuel | 0.35 | |
| natural gas → IsA → considered fossil fuels | 0.34 | |
| natural gas → IsA → the fuel of the future | 0.34 | |
| natural gas → IsA → same natural gas | 0.32 | |
| natural gas → IsA → good fuel | 0.31 | |
| natural gas → IsA → combustible mixture of hydrocar… | 0.28 | |
| natural gas → IsA → versatile fuel | 0.26 | |
| natural gas → IsA → cleaner fuel than diesel | 0.23 | |
| natural gas → IsA → growing fossil fuel | 0.16 |