Today marks a turning point in the world of carbon removal. Planetary, in collaboration with Isometric and 350Solutions, has officially delivered the first-ever independently verified carbon removal credits from Ocean Alkalinity Enhancement (OAE). These credits, totaling 625.6 tonnes of CO₂ removed, were generated at our project site in Halifax, Nova Scotia, and purchased by Stripe, Shopify, and British Airways.
This achievement demonstrates that OAE can be done safely, scientifically, measurably, and alongside community.
What Are OAE Credits and Why Do They Matter?
Ocean Alkalinity Enhancement is a climate solution that restores the ocean’s natural ability to absorb carbon dioxide from the atmosphere. By adding finely ground, naturally alkaline minerals to coastal waters, OAE restores and accelerates one of the critical geochemical processes that has been regulating Earth’s climate for millions of years.
This process reduces ocean acidity and triggers a chain reaction: as excess carbonic acid in the water is neutralized, the ocean draws down more CO₂ from the air to rebalance. The result is long-term carbon removal stored as stable bicarbonates in the ocean for tens of thousands of years.
Until now, no one has issued verified OAE credits. This new chapter shows that OAE can be rigorously measured and transparently verified, bringing this work from experimentation into real-world climate impact.
How We Did It
These credits were issued using Isometric’s industry-first OAE protocol, a scientifically rigorous framework for monitoring, reporting, and verification (MRV). The protocol combines high-resolution modeling with real-world data to quantify the net carbon removal from the Tufts Cove project, a coastal site where Planetary doses alkalinity through an existing power plant outfall, under government permits and strict environmental oversight.
To generate these credits, Planetary:
- Dosed 1103.2 tonnes of alkalinity, sourced from rigorously tested industrial byproducts.
- Worked under oversight from Canadian regulators with environmental safeguards and frequent monitoring.
- Partnered with scientists, stakeholders, and local communities to build trust, transparency, and credibility.
- Participated in open scientific forums to preview data, take tough questions, and improve the industry approach going forward.
From modeling near-field impacts to measuring trace metals in sediments, this work has involved hundreds of data points, expert peer review, and critical feedback from academic and environmental communities alike.
Building The System
We’re proud of the credits, but even more proud of the system behind them.
Carbon removal poses complex challenges. That’s why we prioritized scientific transparency and conservative assumptions throughout the process. These credits are not just numbers, and they’re backed by public data, academic dialogue, and independent verification.
We believe this is what builds trust in a new climate solution: showing our work, listening to concerns, and iterating with integrity.
As Mike Kelland, our Co-Founder and CEO, puts it:
“This is a huge moment not just for Planetary, but for the entire field of carbon removal. We’ve moved from idea to impact. These credits are proof that OAE can be done safely, can be measured rigorously, and are part of solving climate change at scale. It’s exciting to see science, community, and innovation come together in such a powerful way.”
What’s Next?
We know this is just the beginning.
As the demand for high-quality, durable carbon removal grows, OAE is emerging as a critical piece of the climate puzzle. Our process is easily integrated into existing coastal infrastructure, requires little land and electricity, and offers co-benefits like reducing local ocean acidification.
We’re continuing to scale with caution and care, improving our models, listening to feedback, and working with regulators, researchers, and coastal communities every step of the way.
For those asking: Can marine carbon removal be trusted? Can it scale? We hope this first issuance answers with a resounding: Yes, when it’s done right.
To our partners, regulators, scientists, funders, and community members: Thank you for helping make this possible.
Want to Learn More?
- View the verified credits on the Isometric Registry → https://registry.isometric.com/supplier/spl_1H4RJ0NBR1S0JKNR
- Learn more about how OAE works → https://www.planetarytech.com/science/
