Rust from ovens could be the key to making unlimited amounts of cheap fuel that could power anything, scientists have discovered.
A team used ceria, which forms when ovens are heated, to strip oxygen from water and carbon dioxide and leave them with the basics of a liquid fuel.
They said that potentially this fuel could be turned into cells which could power machines or converted into a natural gas for a generator.
The discovery raises the prospect of a very cheap power source being created from just sunlight, water and carbon dioxide, some of the most plentiful elements on Earth.
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