| Answer | Crossword Clue |
|---|---|
| PEATS | Substances used as fuel. |
| PEAT | Turf used as fuel. |
| METHANE | Hydrocarbon used as fuel. |
| ETHANE | Gas used as fuel |
| PEAT | Moss used as fuel |
| ETHANE | Gas used as a fuel |
| PEAT | Plant matter used as fuel. |
| PEAT | Vegetable matter used as fuel |
| PEAT | Decayed matter used as fuel |
| GASOIL | Petroleum distillate used as fuel |
| PEAT | Decayed plant material used as fuel |
| BUTANE | Compound used as a fuel gas |
| ETHANE | Colorless, odorless gas used as fuel |
| WHALEOIL | Blubber extract once used as lamp fuel |
