Iceland is developing a suite of technologies that should help it reach carbon neutrality by 2040: its research could also help other countries go green too. Inside a small, geodesic dome near Iceland’s Hellisheiði geothermal power station, water full of carbon dioxide is being pumped hundreds of metres down into the porous basalt: the water is so clear that the pipe looks empty. The CO2 will react with metals in the rock and turn into carbonates, locking it away safely for millennia.
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