Startup hits milestone in its bid to cut concrete’s dirtiest ingredient

Published on September 21, 2023

NEW YORK CITY — The startup CarbonBuilt has hit a key milestone in its quest to kick a notoriously carbon-intensive ingredient out of concrete. On Thursday, the Los Angeles–based company said it had eliminated the use of “ original Portland cement ” in its concrete blocks, allowing CarbonBuilt to drastically reduce…

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A look at the secret world where our waste ends up

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In August 2019, the sprawling Kpone landfill, 25 miles from the center of Accra, Ghana, burst into flames. As the city’s only engineered landfill, Kpone had been collecting cast-off clothing from the United States and other wealthy countries for years. As they soaked up rain, the textiles trapped gases and chemicals that emanated from all that decomposing trash until, one day, the landfill explode