Travertine Technologies, Inc. announced the closing of its $8.5 million financing to commercialize a novel electrochemical platform that enables carbon-negative production of fertilizer and critical elements like lithium and nickel while eliminating chemical waste.

The financing was co-led by Holcim MAQER Ventures, with participation from the Grantham Foundation for the Protection of the Environment and venture capital firms Clean Energy Ventures and Bidra Innovation Ventures.