Injecting CO2 into iron-rich rock could yield hydrogen.

The same reaction that produces the fuel also mineralizes the carbon dioxide.

Researchers are testing the process on iron-rich rock formations deep beneath Australia’s west.

It remains unclear how much of the rock formation is suitable for the process.

How each outlet framed it
Phys.org
frames orange hydrogen as dual-benefit process for simultaneous clean energy production and CO2 sequestration

Sources: Phys.org