Sandra Osk Snaebjornsdottir

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In Iceland, a country of geysers, glaciers and volcanoes, at least half of the energy produced comes from geothermal sources. (Mariana Suarez/AFP/Getty Images)

Iceland turns carbon dioxide to rock for cleaner air

In the heart of Iceland’s volcano country, 21st-century alchemists are transforming carbon dioxide into rock for eternity

Jeremie Richard