New research from the University of Edinburgh shows that carbon dioxide (CO2) emissions can be captured and securely stored beneath deep-seated and impermeable underground rocks.
Researchers studied natural CO2 gas fields and CO2 mineral springs in south-east Australia to improve the understanding of how to safely store CO2 underground.
By measuring tiny traces of inactive natural gases, known as noble gases, found in the CO2 they were able to show that, in both the gas fields and mineral springs, the CO2 had come from the same source, the Earth’s mantle.
The Earth’s mantle is around 40 kilometres below the depth where the samples were collected from.
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