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Marine Anoxic Carbon Storage

With careful science and transparent risk assessment, MACS has the potential to become an important part of a broader climate solution. All our rigorous methodologies are developed under one Puro Standard.

MACS

The key concept of MACS is to deposit land-derived biomass to lock carbon away in deep, oxygen-depleted (anoxic) marine basins, where it can remain for 200+ years.

key benefits

Permanent storage in stable anoxic environments

Reliability and safety

Robust safeguards ensure reliable and safe carbon removals and protection of marine ecosystems.

Permanent CO2 removal

MACS can achieve permanent CO2 removal by isolating carbon in stable, anoxic environments.

Transparency

Provide transparent results through rigorous monitoring, third-party verification, and strict environmental and social standards.

integrated storage

Scalable terrestrial and marine removal

MACS represents one of the more creative and potentially scalable carbon storage ideas on the horizon. This methodology is unique in the sense that it stands at the crossroads between terrestrial and marine carbon dioxide removal approaches.

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all methodologies

Puro.earth methodologies for carbon removal

Direct Air Capture and Ocean Storage

This safe, durable and quantifiably robust methodology under Puro Standard can achieve highly permanent carbon removal of 1,000+ years.…

Durability 1000+ years

Microalgae Carbon Fixation and Sinking

MCFS under Puro Standard supports long-term CO2 removal by fostering local microalgae growth on engineered substrates, which then sink…

Durability 200+ years

Terrestrial Storage of Biomass

Under Puro Standard, this methodology is an innovative approach to store carbon for 100+ years. Terrestrial storage of biomass…

Durability 100+ years

Biochar

Close up background texture of many black lump charcoal pieces ready for barbecue grill, elevated top view, directly above

Biochar is the leading durable carbon dioxide removal technology in both delivery and market liquidity. The Puro Standard brings…

Durability 200+ years

Geologically Stored Carbon

GSC methodologies capture carbon dioxide and store it underground in deep geological formations. It covers both BECCS and DAC-based…

Durability 1000+ years

Enhanced Rock Weathering

Under the Puro Standard, Puro.earth developed the first enhanced rock weathering (ERW) carbon crediting methodology. ERW is a process…

Durability 1000+ years

Carbonated Materials

This methodology under Puro Standard represents an attractive pathway for durable carbon dioxide removal – with a growing interest…

Durability 1,000+ years

Marine Anoxic Carbon Storage

With careful science and transparent risk assessment, MACS has the potential to become an important part of a broader…

Durability 200+ years

faq

Top methodologies and Puro Standard FAQ

see also

More about our methodologies and infrastructure

  • Puro Standard

Methodologies

In 2019, we pioneered the world’s first standard dedicated exclusively to engineered carbon removal. Today, Puro.earth’s infrastructure provides the…

  • Infrastructure
  • Puro Standard

The Puro Standard for carbon removal

Puro.earth turns verified carbon removals into trusted market assets. We provide the certification infrastructure, rigorous methodologies and transparent Nasdaq-powered…

  • Supply

CDR Supplier facilities

Puro.earth has one of the largest CDR supplier network with facilities across the globe.