A California startup using rocks to soak up carbon dioxide from the air has teamed up with a Canadian company to mineralize the gas in concrete, a technological tie-up that is a first and they say could provide a model for fighting climate change globally.
“Today this is a thimbleful of emissions abatement. You know, that's how it starts,” said Julio Friedmann, chief scientist at Carbon Direct, which works with companies to manage their carbon footprint. Because concrete is so widely used, it has great potential for absorbing CO2, if the process works and goes global. “The thing about direct air capture and concrete is it's a big prize together," he said.
"Limestone has this natural ability to pull carbon out of the atmosphere. The problem is it's just slow. So what we do here is just give it more superpowers to make it pull carbon much, much, much faster than it otherwise would," said Heirloom CEO Shashank Samala. This week, CarbonCure incorporated the gas into water used to clean out trucks. The CO2 reacted with leftover ingredients and then was put into a new batch of concrete.
"To remove a billion tons from the air we need in the order of mid-hundreds of billions of dollars," said Samala, who expects funders of solar, buildings, transmission towers and other infrastructure to finance carbon infrastructure, too.
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