Sublime

According to a recent study by a team of German scientists, to remove a billion tons of CO2 through “enhanced weathering,” approximately three billion tons of basalt would have to be mined, crushed, and transported. “While this is a very large amount” of rock to mine, grind, and ship, the authors noted, it is…

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David Keith, a professor of applied physics at Harvard, has been described as “perhaps the foremost proponent of geoengineering,” a characterization that he bristles at. “I’m a proponent of reality,” he wrote in a letter to the editor of The New York Times in 2015. Keith founded the university’s Solar Geoengineering Research Program in 2017, and he

of

under 2,000 pounds and under $2,000”—were

Because no one was going to let us build experimental reactors in the real world, we set up a lab of supercomputers in Bellevue, Washington, where the team runs digital simulations of different reactor designs.

the U.S.

and coal- and natural-gas-fired plants equipped with devices that capture the carbon they produce.

grid-scale energy storage,