Alt Carbon is a deeptech science and data company, building infrastructure for Planetary Intelligence. We aim to make South Asia a hub for Carbon Dioxide Removal (CDR) through technology pathways like Enhanced Rock Weathering and Biochar. We work with farmers and scientists in the Global South, to turn underutilized land into carbon sinks. Our flagship initiative, the Darjeeling Revival Project (DRP), is a first-of-its-kind effort to unite climate action with cultural and ecological restoration — by reviving degraded soils, restoring livelihoods, and rebuilding ecosystems. Last year, we also launched the Bengal Renaissance Project (BRP), an industrial biochar program that is building a network of biomass banks, and pyrolysis and gasification plants across Eastern India, with a mission to weave hope back into the lands of India. We’re rooted in science, powered by community, and driven by the belief that revivals require ambitious people and audacious bets.
Alt Carbon is based out of Bangalore/Darjeeling & was founded by tea planter siblings Sparsh & Shrey Agarwal. Our latest seed round for $12m was led by Lachy Groom. Our mission is to remove 5 million metric tons of CO₂ by 2030.
For a detailed origin storyline of how Alt Carbon came to be, and our plan to revive Darjeeling 👇
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Our Journey to Revive Darjeeling
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Alt Futures is South Asia’s largest Carbon Removal (CDR) summit.
Hosted by Alt Carbon, Alt Futures is a journey of storytelling and science, bringing the most important decision-makers from the world of venture capital, banking, government, academia, startups, & the corporate sector under one roof.
The 2nd edition of the Summit hosted more than a 1,000 people across Bangalore and Darjeeling, creating a confluence to scale Carbon Dioxide Removal (CDR) for South Asia.
Alter Magazine is a monthly journal bringing to the world new literary writing on Science, Technology, and Progress, from South Asia.
With every story, we aim to alter our readers views & perceptions, bringing to them contemporary geniuses, cutting-edge ideas, and pathbreaking discoveries. This is a living journal documenting the dreams and dilemmas shaping South Asia’s aspirations for progress, capturing the region’s diverse energies as it seeks not just advancement for itself, but to help write the next chapter of collective human progress.
One long-form story a month delivered to your inbox. You can follow our stories on X.