Isometric Certifies First Nature-Based Carbon Credits From Mombak's Amazon Reforestation Project

Isometric has issued its first nature-based certification, covering the inaugural batch of reforestation credits generated by Brazilian carbon removal company Mombak. The milestone marks a step forward for a segment of the carbon market that has long faced credibility questions.

Mombak has generated 21,771 reforestation credits from its Reforesting the Brazilian Amazon Project 1. Beyond being Isometric's first nature-based certification, the credits mark Mombak's first reforestation issuance and, according to the companies, the world's first native-species reforestation credits certified using dynamic baselines.

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A protocol built around independent verification

The credits were certified under Isometric's Reforestation Protocol, which the Integrity Council for the Voluntary Carbon Market approved to carry the Core Carbon Principles (CCP) label in February 2026, one of the market's clearest independent quality signals.

Unlike legacy frameworks that let suppliers set their own baselines, Isometric sets dynamic baselines independently using multiple control plots rather than static parameters fixed for a decade at a time. Remote sensing data is grounded with real-world field measurements, so each credit is meant to reflect an actual tonne of carbon removed rather than a modeled estimate.

Restoring degraded pastureland in the Amazon

Mombak's work focuses on converting degraded pastureland in the Brazilian Amazon into biodiverse forest through native species planting and assisted natural regeneration. Reporting on the issuance puts the project at 12 farms, with close to 15 million trees planted across more than 100 native species, 16 of them endangered, and close to 600 direct jobs created in vulnerable Amazonian regions.

Mombak has secured sales agreements worth more than $170 million in contracted revenue, with buyers including Google, McKinsey, and Microsoft. Its Amazon reforestation project was also the first initiative selected by the Symbiosis Coalition, a corporate advance market commitment for nature-based carbon removal.

What the companies are saying

The credits were issued through Certify, Isometric's certification platform, with the evidence and calculations behind each one published on the Isometric Registry.

Eamon Jubbawy, CEO of Isometric, said forest carbon is "the most scrutinized corner of carbon markets, and for good reason," pointing to a history of credits issued on estimates rather than verified data.

Dan Harburg, Chief Product Officer of Mombak, said bringing the company's reforestation projects to Isometric "was the natural next step" after working with the registry on its enhanced weathering project.

About Isometric

Isometric is a science-led carbon removal registry that certifies credits across pathways including direct air capture, enhanced weathering, biochar, and reforestation, with a focus on field-verified measurement over modeled estimates.

About Mombak

Mombak is a Brazilian carbon removal company restoring degraded pastureland in the Amazon through large-scale native species reforestation, with a stated goal of becoming the world's largest carbon removal company.