carbon dioxide
| GAS |
| Word | Clue |
|---|---|
| COAL | carbon |
| FUEL | gasoline or natural gas |
| CYCLE | vicious or carbon |
| SMELL | odor |
| STEEL | stainless or carbon |
| BUTANE | alkane with four carbon atoms |
| DIAMOND | allotrope of carbon |
| GRAPHITE | allotrope of carbon |
| COAL | carbon |
| SELTZER | carbonated water |