"By decomposing minerals at ambient temperature using electrochemistry, it actually allows us to use minerals that contain calcium for cement that aren't limestone, and that's what makes us true zero as opposed to net zero," Ellis explained. Its One Boston Wharf Road will be the largest net zero office building in the city, with Sublime cement in the ground floor public space. Its venture capital backers are Lower Carbon Capital, Engine Ventures, Energy Impact Partners, Prime Impact Fund, Siam Cement Group and MCJ Collective. For perspective, about 90 million tons of cement are produced in the U.S. per year. "This is a first-of-a kind process, and we're competing with a technologies that have been scaled to a million tons per year plus for, you know, decades.

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Persons: Leah Ellis, Ellis, they'll, Yanni Tsipis, Lisa Rizzolo Organizations: Systems, Sublime Systems, WS Development, Sublime, U.S . Department of Energy, Carbon, Engine Ventures, Energy Impact Partners, Impact Fund, Siam Cement Group, MCJ, CNBC Locations: Fortera, Massachusetts, Boston, Portland, U.S