Where tradition meets innovation for the fight against climate change

Where tradition meets innovation for the fight against climate change

At Alt Carbon, we're pioneering a natural, sustainable solution to combat climate change by accelerating the chemical weathering of powdered silicate rock in the foothills of the Himalayas.

At Alt Carbon, we're pioneering a natural, sustainable solution to combat climate change by accelerating the chemical weathering of powdered silicate rock in the foothills of the Himalayas.

Trusted by the best

Trusted by the best

Why remove carbon permanently?

To keep on a 1.5°C pathway, current emission must drop by 50% by 2030 and reach net zero by 2050. this is only possible if we reach our carbon removal targets every decade, hereon.

Why remove carbon permanently?

To keep on a 1.5°C pathway, current emission must drop by 50% by 2030 and reach net zero by 2050. this is only possible if we reach our carbon removal targets every decade, hereon.

What is Enhanced Rock Weathering?

For millions of years, CO₂ has combined with rain to form dilute acid - when this falls on mountains and rocks, the CO₂ interacts with the rocks, mineralizes and is safely stored as carbonates. we speed this process up so that, CO₂ can be locked away swiftly and at scale.

Why not any other method?

Unlike avoidance or other removal methods, rock weathering ensures that CO2 is permanently locked away for 10,000+ years. also, it’s the most scalable method out there since it can remove up-to 4 Gt of CO2 per year, i.e 40% of global targets.

Why remove carbon permanently?

To keep on a 1.5°C pathway, current emission must drop by 50% by 2030 and reach net zero by 2050. this is only possible if we reach our carbon removal targets every decade, hereon.

What is Enhanced Rock Weathering?

For millions of years, CO₂ has combined with rain to form dilute acid - when this falls on mountains and rocks, the CO₂ interacts with the rocks, mineralizes and is safely stored as carbonates. we speed this process up so that, CO₂ can be locked away swiftly and at scale.

Why not any other method?

Unlike avoidance or other removal methods, rock weathering ensures that CO2 is permanently locked away for 10,000+ years. also, it’s the most scalable method out there since it can remove up-to 4 Gt of CO2 per year, i.e 40% of global targets.

Our method of removal

Our partners

Our partners

What is ERW?

What is ERW?

For millions of years, CO₂ has combined with rainwater to form dilute acid that reacts with mountains and rocks. This natural process, known as silicate weathering, allows CO₂ to interact with the minerals, forming bicarbonate ions that are eventually stored safely in soil and oceans for tens of thousand years. At Alt Carbon, we accelerate this process, enabling CO₂ to be mineralized and permanently locked away swiftly and at scale, offering a powerful solution for long-term carbon storage.

For millions of years, CO₂ has combined with rainwater to form dilute acid that reacts with mountains and rocks. This natural process, known as silicate weathering, allows CO₂ to interact with the minerals, forming bicarbonate ions that are eventually stored safely in soil and oceans for tens of thousand years. At Alt Carbon, we accelerate this process, enabling CO₂ to be mineralized and permanently locked away swiftly and at scale, offering a powerful solution for long-term carbon storage.

Our deployment is in collaboration with the tea gardens of Darjeeling. Here, nature provides the perfect setting for our mission, with:

Our deployment is in collaboration with the tea gardens of Darjeeling. Here, nature provides the perfect setting for our mission, with:

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High Temperature

High Temperature

~25-35°C speed up the chemical reactions that capture CO2.

~25-35°C speed up the chemical reactions that capture CO2.

High Humidity

High Humidity

~ 75-90% create an ideal environment for weathering processes.

~ 75-90% create an ideal environment for weathering processes.

Feedstock Access

Feedstock Access

~4000 GT of basalt makes India well-suited geologically.

~4000 GT of basalt makes India well-suited geologically.

Intense Rainfall

Intense Rainfall

~3000 mm of annual rain accelerates weathering further.

~3000 mm of annual rain accelerates weathering further.

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Our mission

tons of CO2 removal by 2030

tons of co removal by 2030

4/35 billion

4/35 billion

tons of CO2 currently absorbed annually

tons of CO2 currently absorbed annually

Net Zero

Net Zero

2024

2035

Regionally Sourced, Locally Deployed

Regionally Sourced, Locally Deployed

We utilize locally sourced fine basalt dust, ensuring that our operations are both sustainable and supportive of local economies. Our unique approach involves partnering with the Darjeeling tea industry—India's first Geographical Indication (GI) tagged product—integrating our methods seamlessly with traditional farming practices.

We utilize locally sourced fine basalt dust, ensuring that our operations are both sustainable and supportive of local economies. Our unique approach involves partnering with the Darjeeling tea industry—India's first Geographical Indication (GI) tagged product—integrating our methods seamlessly with traditional farming practices.

Darjeeling revival project

Reviving Darjeeling’s tea industry from climate crisis to pioneers of climate action

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Empowering Communities, Sustaining the Future

Empowering Communities, Sustaining the Future

With deep roots in the Global South, Alt Carbon is committed to a cost-effective, efficient supply chain that enhances not only the environment but also the livelihoods of local farming communities. By improving soil health and increasing crop productivity, we're not just addressing climate change but also enriching the lives of those who depend on the land.

With deep roots in the Global South, Alt Carbon is committed to a cost-effective, efficient supply chain that enhances not only the environment but also the livelihoods of local farming communities. By improving soil health and increasing crop productivity, we're not just addressing climate change but also enriching the lives of those who depend on the land.

We are Farmer First

Empowering farmers through sustainable, climate-smart agriculture

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Address

Alt Carbon Tech Pvt. Ltd, 240/B, 3rd floor, A.J.C. Bose Road, Kolkata, West Bengal, India

Address

Alt Carbon Tech Pvt. Ltd, 240/B, 3rd floor, A.J.C. Bose Road, Kolkata, West Bengal, India