How we make cement isn’t set in stone: Brimstone raises $55M in huge pre-revenue round

Brimstone Energy is taking on a challenge of biblical proportions: producing mass-market, zero-carbon Portland cement, a key building material. If it succeeds, the implications for the real estate and construction industries are so enormous that investors have poured $55 million into the startup before it has made a single dollar. Bill Gates’ Breakthrough Energy Ventures and DCVC co-led the Series A round, with participation from Fifth Wall’s climate tech fund, Amazon through its Climate Pledge