On 14 November, I toured a transport container bristling with tubes and wires, perched beside New York Metropolis’s East river. It’s the take a look at web site of a start-up known as Vycarb, which just lately started including crushed rocks and different chemical compounds to the water to take away carbon dioxide from the ambiance.
On one aspect of the container, an hourglass-like machine blended a positive stream of calcium carbonate mineral powder with water pumped from beneath. This alkaline, grey-green slurry was then launched into an…