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This startup uses volcanic rock dust to suck carbon dioxide out of the air

Talib Visram of Fast Company reports on Lithos Carbon, which is using rocks to address climate change.

The C3 Take
  • Lithos Carbon is pulling CO2 from the air using Enhanced Rock Weathering (EWR).
  • EWR works by spreading crushed basalt over farmland where it mixes with rainwater to convert CO2 into dissolved bicarbonate.
  • The company estimates that three tons of its solution can capture one ton of atmospheric CO2.
  • Lithos has been named as a winner in Fast Company’s World Changing Ideas Awards.

“Startup Lithos Carbon, however, is focusing on the land, and a natural tool: basalt, a black igneous rock that’s common on volcanically active islands like Hawaii and Iceland. Lithos recycles existing basalt dust—a quarrying by-product—and spreads it over crop land. When rainwater mixes with the basalt dust, it triggers a chemical reaction that captures and locks up CO2 as bicarbonate.”

Read the full article here.

The views and opinions expressed are those of the author’s and do not necessarily reflect the official policy or position of C3.

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