| Answer | Crossword Clue |
|---|---|
| PEAT | Plant matter for fuel |
| PEAT | Plant matter used as fuel. |
| BIOMASS | Organic matter used for fuel |
| BIOMASS | Plant material used for fuel |
| PEAT | Vegetable-matter fuel |
| PEAT | Decayed matter used as fuel |
| BIOMASS | Organic matter convertible to fuel |
| PEAT | Vegetable matter used as fuel |
| BIOGAS | Renewable fuel derived from organic matter |
| COALS | Lumps of mineralized vegetable matter fuel. |
