Alt Carbon accelerates enhanced rock weathering by spreading its proprietary Hari Mati blend—organic nutrients and silicate‑rich mineral amendments—on agricultural land, which boosts crop yields while converting dissolved CO₂ into stable carbonate minerals for millennial storage. The company couples field deployment with its Atlas data platform and an in‑house Earth‑science lab to monitor soil chemistry, verify carbon removal, and generate certified carbon credits for farmers, corporations, and governments.
Funding
$12M raised to dateRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.
1OLGFounders
Product
Problem
Current natural rock weathering that captures CO₂ is a slow, geographically limited process, making it insufficient to meet the scale and speed required for historic carbon removal needed to limit global warming.
Solution
Alt Carbon accelerates natural enhanced rock weathering by applying Hari Mati—a proprietary blend of organic inputs and silicate‑rich mineral amendments—to agricultural lands, primarily in Darjeeling. The amendment releases nutrients that improve crop yields while increasing soil alkalinity, enabling dissolved CO₂ from rainwater to react with silicates and form stable carbonate minerals that are sequestered for millennia. Alt Carbon couples this field operation with a high‑resolution data platform, Atlas, which continuously monitors soil chemistry, mineralogy, groundwater, and microclimate to quantify CO₂ removal and generate verified carbon credits. By integrating scientific research, large‑scale sampling, and a dedicated Earth‑science laboratory (D‑CAL), the company creates a repeatable, scalable infrastructure for long‑term carbon dioxide removal in the Global South.
Target Audience
Primary customers are landowners and farmers in South Asia seeking yield‑enhancing inputs and carbon‑credit revenue, as well as corporations and governments purchasing verified carbon removal credits.
Features
- Proprietary Hari Mati formulation combining organic nutrients with silicate‑rich rock powders for simultaneous agronomic benefits and accelerated mineral carbonation
- Field deployment on farmlands with demonstrated yield improvements and soil pH stabilization
- Atlas data platform that records longitudinal environmental parameters (soil chemistry, mineralogy, groundwater dynamics, microclimate) at high spatial resolution
- End‑to‑end carbon accounting workflow: large‑scale land mapping, systematic soil and water sampling, and laboratory analysis of up to 100,000 samples annually
- In‑house Darjeeling Climate Action Lab (D‑CAL) for rapid R&D, method validation, and generation of verified ERW carbon credits
- Focus on high‑weathering-rate regions (e.g., Darjeeling) to maximize CO₂ capture per hectare