| Answer | Crossword Clue |
|---|---|
| MARSHGAS | Methane from a swamp |
| PROPANE | A methane from crude petroleum. |
| methanol | A toxic, colorless, volatile flammable liquid alcohol, originally made by distillation from wood and now chiefly by oxidizing methane |
| CROAK | Sound from a swamp |
| tumps | clump of grass, shrubs, or trees, esp. rising from a swamp or bog |
| tump | clump of grass, shrubs, or trees, esp. rising from a swamp or bog |
