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Scientists have up with a smart but simple way to with carbon dioxide emissions, by turning them back into stone. Researchers in Iceland 220 tons of CO2 deep underground into volcanic rock. It with minerals in the rock and over a relatively short space of time, into a chalk-like solid substance similar to limestone. The team their surprise at both the success and the speed of the CO2 conversion. Lead scientist Juerg Matter : "Of our 220 tons of injected CO2, 95 per cent was to limestone in less than two years." He added: "It was a huge surprise to all the scientists in the project, and we , 'Wow! This is really fast'."

The scientists hope their experiment will adapted on a larger, more industrial scale. It could help to the problem of growing CO2 emissions entering the atmosphere and warming the planet. It could also a key technique in carbon capture and storage (CCS) solutions. Many other CCS techniques have injecting and trapping CO2 underground. However, there always the problem of the emissions leaking their way back above ground and into the atmosphere. Dr Matter enthusiastic about his team's experiments. He : "We to deal with rising carbon emissions and this the ultimate permanent storage – them back to stone."