Montréal cleantech firm Exterra has raised $20 million in Series A funding to scale its technologies for turning asbestos mine waste into valuable materials and carbon storage assets. Backed by Clean Energy Ventures, BDC Capital, and Investissement Québec, Exterra plans to build the world’s largest asbestos tailings mitigation plant by 2027.
Its process extracts minerals like nickel and magnesium oxide, then converts them into carbon-sequestering compounds. With operations planned in Québec’s historic asbestos towns, the project combines industrial reuse, emissions reduction, and economic revitalization. The company’s carbon credits are already spoken for by Frontier Climate and MaRS.
Want to know more? Check out the source code on BetaKit.