In an innovative climate initiative, starting from the Family Tea Estate, Alt carbon A seed round has collected $ 12 million in a seed round because of its plan to remove carbon dioxide in South Asian country. Climate-Tech Startup, which looted carbon for thousands of years through the enhanced rock Weathering in agricultural lands, attracted investment led by Lachi Groom, co-founder of Physical Intelligence, Robotics AI.
The journey began in May 2020 with the return of a Bitsuit homeland. Siblings Shish and Spurs Agarwal drove a 16 -hour car from East Kolkata State to Darjeeling – Himalayan leaves are a city known for tea cultivation at the foot – their family’s tea estate, expected to depart for Salem Hill, which was confronted by bankruptcy. Instead, that farewell inspection planted seeds for Alt Carbon, which they formally launched in the late 2023.
Initially, they searched carbon markets as a way to support other tea estates in the region by recovering their family business and earning complementary income. However, during their search, they discovered the enhanced rock Weathering as an approach that could convert Darjeeling’s legacy to the border of climate activity, at risk of climate change.
“In the carbon market, we realized that many of India’s projects, which were more avoided, very low quality and they produce junk credit,” said Sparsh in a private interview.
Last year, Alt Carbon started his pilot around Agarwals’ family tea estate on about 5 acres of land, which they later expanded their opportunities between rice and bamboo from small tea farms in north Bengal. The startup’s goal is to extend to 500,000 hectares of land.
By 2030, the target of the startup is to remove 5 million tonnes of carbon from the zone, sparsh tells TechCrunch.

In the East India, the Rajmahal traps are deployed from the mines and quarries of the province of Ignius province, using the Basalt Rock Dust, extended rock weight. Rock dust, a waste product of the construction industry, spreads to the farm fields where it reacts naturally with rainwater to remove carbon dioxide and improve its fertility and health and add micronutrient to the soil to increase crop yields. When carbon dioxide rain water communicates with basalt dust, it forms stable bicarbonate ions. They are stored on the ground and eventually flows through the rivers, where they are fixed as calcium carbonate, lock carbon for more than 10,000 years.
For transporting specialized dust to farm fields from sources, the startup depends on rail and diesel trucks and pays for one -way rent because these sources are part of the tea industry’s freight transport system. The startup avoids emission from dedicated rock processing depending on the waste basalt from existing excavations and crushing operations.
Instead of using basalt dust alone, the startup has created a combination of basalt owned with other organic ingredients, which is called Hari Mati (green soil in Hindi), to persuade the farmers to spread to their agricultural lands.
The alt carbon estimates its carbon credit $ 270 per metric ton, which sparsh said that direct air capture is significantly cheaper than credits that he believes, spending about $ 800 per ton. But he hopes that the startup will reduce the cost between 36 and 48 months.
Shri told TechCrunch that Shri told TechCrunch that the startup depends on the three levels of measuring to understand how much the rock is being worn and how much carbon is being removed. It starts with measurement to track the progress of the weather and then moves to the water measurement of water, groundwater samples and river monitoring in the soil. The third layer uses the owned reactionary transport models that help track the ions transferred from the soil to the reservoir. Startup also uses machine learning-powered modeling to get the carbon removal number.
Alt Carbon says that its models are closely adhered to by the procedures prescribed by the registry with its models isometric and full. They have also received approval from inter -government agencies including SBTI, ICVCM and Corsia.
The startup has its labs in Darjeeling and Bengaluru and employed 8 to 10 PhD with the overall headcount of 25 employees. Its goal is to make these labs scale and analyze more soil samples and even expand its work by setting up a hardware studio to collect better, high quality data using remote sensing. The startup plans to set up sensors to the ground to get more insight at low cost and quick time. The seeds led by all these grooms will come through the round.
Last year, the startup is secure a Pre-purchased $ 500,000 by FrontierAnd a promise of a $ 1 billion advanced market led by strips, alphabet, meta, shopfi and McKinsi. This is recent The buyer has signed a strategic partnership with the alliance, NextzenStarted by the South Pole and Mitsubishi Corporation, to make its extended rock weathering scale. This group included members of the BCG Group, Swiss Area, LGT and UBS. Last month, the startup has signed a OffTech Agreement with Japan Shipping Agency Mole GroupTo buy 10,000 tons of carbon removal credit.
Sparsh said Ult Carbon would supply its first carbon credit to less than a month through isometric.
