Steel igloos cover injection wells that the Icelandic start-up company Carbfix uses to inject carbon dioxide into the earth outside Reykjavik, Iceland, on Oct. 6, 2021. Carbfix has discovered that its CO2 mix will chemically react with basalt and turn to rock in just two or three years instead of the centuries that the mineralization process was believed to take; Image: Sigga Ella/The New York Times
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