EnvironmentA report by the African Tech Futures Lab urges a selective, location-specific approach to carbon dioxide removal in Africa, naming biochar and enhanced rock weathering as low-infrastructure options with possible farm benefits.
AgrotechThe Swiss climate-tech start-up turns crop residues into biochar in small reactors near where they are produced and returns it to soils, and will use the money to make its system a repeatable hardware and software product.
CapChar's integrated system turns local woodchip into biochar for cattle bedding, banks the pyrolysis heat in a patent-pending thermal battery for drying fuel wood, and measures the carbon removed, about 250 t CO2e expected from the 80-hectare South Downs livestock farm.
Stanford spin-out Mafix has raised $5.4 million in pre-seed funding to heat silicate rock with limestone in cement kilns, producing a mineral that weathers in a single season on farmland, removes carbon dioxide and supplies plant-available silicon and alkalinity.
