| Answer | Crossword Clue |
|---|---|
| BIOMASS | Natural material used for fuel |
| BIOMASS | Plant material used for fuel |
| PEAT | Decayed plant material used as fuel |
| CHARCOAL | Material for fuel or pencils |
| GASES | Mixtures used for fuel. |
| PEAT | Turf used for fuel |
| STERNO | Jelly used for fuel |
| STERNO | Jelly brand used for fuel |
| BIOMASS | Organic matter used for fuel |
| DEGREEDAYS | Units used for measuring fuel needs |
