The Startup Turning Mine Tailings Into Carbon-Absorbing Rock

Episode 53 of The Climate Tech Podcast with Fexingo. Lucas and Luna explore a new frontier in carbon removal: enhanced rock weathering using mine waste. They profile one startup that pulverizes ultramafic tailings from abandoned nickel mines and spreads the dust on agricultural land, where natural chemical reactions pull CO2 from the atmosphere. The hosts break down the chemistry (olivine + CO2 = magnesium carbonate + silica), the economics (carbon credits at $200 per ton versus $600 per ton for direct air capture), and the land-use math: a single mine's tailings pile can sequester the equivalent of the mine's entire operational emissions. They also discuss a 2024 field trial on 500 acres of cornfields in Pennsylvania that showed a 30 percent increase in soil pH and measurable carbonates after one growing season. The episode touches on verification challenges, the role of third-party auditors, and why mining companies are starting to see tailings as a revenue stream rather than a liability. #ClimateTech #CarbonRemoval #EnhancedWeathering #MineTailings #Startup #Olivine #CarbonCredits #RegenerativeAgriculture #Decarbonization #Sustainability #CleanTech #Geochemistry #Business #Technology #FexingoBusiness #BusinessPodcast #ClimateTechPodcast #Energy Keep every episode free: buymeacoffee.com/fexingo