The technique is expensive but it could help fight climate change. Backers hope fast growth can bring down costs.
In an open-air warehouse in California’s Central Valley, 40-foot-tall racks hold hundreds of trays filled with a white powder that turns crusty as it absorbs carbon dioxide from the sky. High Purity Graphite Block
The start-up that built the facility, Heirloom Carbon Technologies, calls it the first commercial plant in the United States to use direct air capture, which involves vacuuming greenhouse gases from the atmosphere. Another plant is operating in Iceland, and some scientists say the technique could be crucial for fighting climate change.
Heirloom will take the carbon dioxide it pulls from the air and have the gas sealed permanently in concrete, where it can’t heat the planet. To earn revenue, the company is selling carbon removal credits to companies paying a premium to offset their own emissions. Microsoft has already signed a deal with Heirloom to remove 315,000 tons of carbon dioxide from the atmosphere.
The company’s first facility in Tracy, Calif., which opens Thursday, is fairly small. The plant can absorb a maximum of 1,000 tons of carbon dioxide per year, equal to the exhaust from about 200 cars. But Heirloom hopes to expand quickly.
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