Related Clues:
- It gives punch to punch
- Biofuel option
- Fuel that yields a net energy loss
- General in charge of utilities?
- Type of shock
- Type of biofuel
- Gas partner
- Biofuel choice
- Like Lionel trains
- Kind of current
- With 50-Across, South American shocker
- Gasohol ingredient
- Gasoline alternative
- Environmental summit topic
- Intoxicating agent