Could this rock save the planet?

Grist

Meet olivine, a greenish rock that is basically the Clark Kent of the mineral world: It may look boring, but it has a secret superpower. Specifically, it can pull CO2 from the air and sequester it — nothing to sniff at when facing down the supervillain of our age: anthropogenic climate change.

Retired geochemist Olaf Schuiling has spent decades advocating for using the abundant mineral as a solution to our climate change woes — by carpeting as many surfaces as possible in the stuff, from playgrounds to roads to beaches, we could allegedly remove enough carbon from the atmosphere to slow the rate of climate change. According to one analysis, one ton of olivine can dispose of approximately two-thirds of a ton of CO2 — impressive, but that’s still a LOT of rock when we’re talking billions of tons of CO2 a year.

“Let the earth help us to save the earth,” Schuiling says, which makes for…

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