involve injecting carbon into geological formations or turning it into rocks, where it will stay put for at least 1,000 years — about the same amount of time that CO2 from the burning of fossil fuels will remain in the atmosphere.

Currently, these durable techniques don’t work at scale: They account for just 0.1 percent of global carbon removal each year

https://grist.org/accountability/report-carbon-dioxide-removal-companies/

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