Australia's red soil may hide a clean energy source

There might be clean fuel hiding under some of Australia's oldest rock. Researchers studied the Pilbara region of Western Australia. Its rock naturally produces hydrogen gas. The reaction happens slowly, between water and iron minerals underground. The study was published in late August. It suggests the reaction could be sped up, releasing far more hydrogen than nature makes alone.

This kind of hydrogen has a name. It's called "natural" or "geologic" hydrogen. It forms underground without burning anything, and without splitting water with electricity either. That's what makes it attractive. It could be cheap, clean fuel, skipping the usual energy cost of making hydrogen. But finding it naturally is one thing. Making it reliably, at a useful scale, is a much bigger step. That step is still unproven.

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Can scientists actually scale this up outside a lab? That's the real test standing between this finding and any real energy supply. The Pilbara's rock formations are enormous, so raw material isn't the limit. The open question is whether the reaction can be sped up cheaply and safely at real scale. Nobody has answered that yet.