The lights, the motors, the vehicles all run by a high-powered gas called methane. Methane comes from pigshit.
10 seconds sound clip from the Mad Max Beyond Thunderdome movie soundboard.
You can hear this line at 00:15:45.042 in the Blu-ray version of the movie.
Quote context
[...]
- That's where Bartertown gets its energy.
- Pigs.
- Pigshit.
- What?
- Pigshit.
- Have a look. Tell me what you see.
- I see a big guy giving a little guy a piggyback.
- Master Blaster. They're a unit. They even share the same name.
- The little one is called Master. He's the brains. He runs Underworld.
- The other one is Blaster. He's the muscle.
[...]