ground iron

burning fine ground iron provides clean renuable energy.

@badradger
And with catalyst action can be turned back to iron.
Kind of like hydrogen comes from water and the exhaust turns back into water.

@badradger said
burning fine ground iron provides clean renuable energy.

How much eneryg do you use to reduce iron oxide into iron and how much can you win back?

This is more of an Engineering Problem of course

@Ponderable
https://newatlas.com/energy/bavarian-brewery-carbon-free-renewable-iron-fuel/

This piece says they would use solar energy to turn the rust back into iron.

Don't know the energy requirement for that but it would be renewable energy.

Cost is the issue.
New tech takes time and money.
The article didn't say anything about how much it would cost to use this tech to power an entire city or how long it would take to build a plant big enough for a practical use.