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Boulder County seed funding supports concrete projects aimed at sucking carbon from atmosphere

A coalition of cities and counties in the western U.S. has awarded $389,000 to four projects aimed at fighting climate change by removing carbon dioxide from the atmosphere through the production of concrete.

Daily Camera

March 9, 2023

Video: 4 Corners project showcase: Regenerative quarry by Minus Materials


May 1, 2023

Minus Materials grows biogenic limestone for carbon-neutral cement

The startup spun out of the University of Colorado Boulder’s Living Materials Laboratory, has received seed investment from SOSV and has already supplied samples of its “biogenic” limestone to partners in the cement industry, such as Microsoft.


August 12, 2022

This startup is using microalgae to make carbon-neutral cement

“We don’t have to change anything about Portland cement production,” he says. No new equipment is required, and the product already meets existing standards. This could cut emissions by 60%, or, if combined with other changes, exceed 100%.”

Fast Company

August 10, 2022

Algae-grown limestone provides route to carbon-negative concrete

Researchers at the University of Colorado Boulder have developed a way of using algae to create carbon-neutral or even carbon-negative concrete. The researchers use biogenic lime limestone grown by algae instead of quarried limestone to make Portland cement, concrete’s key, and most carbon-intensive ingredient.


July 29, 2022

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