Our Members

Santa Fe,
NM
Salt Lake City,
UT
Flagstaff,
AZ
Boulder County,
CO
Albuquerque,
NM

Local leadership is critical to carbon removal's future.

The 4 Corners Carbon Coalition is a not-for-profit network of local governments advancing community-based carbon dioxide removal (CDR). Through Catalytic Grant Campaigns, our members collectively support first-of-a-kind CDR projects that deliver durable carbon removal and local environmental and economic benefits.

Through this model—where local partners co-fund and select projects—4C helps communities demonstrate what high-quality, locally anchored carbon removal looks like in practice.

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Our Campaigns

The 4 Corners Carbon Coalition partners with local governments, nonprofits, and grassroots advocates to launch first-of-their-kind campaigns that accelerate carbon removal where it matters most: in communities.

From purchasing high-quality carbon removal to demonstrating breakthrough technologies in concrete, forestry, farming, and waste, each campaign transforms policy ambition into hands-on action. Together, these efforts prove that local leadership isn’t just part of the climate solution—it’s driving it.

The Community Carbon Removal Purchasing Challenge

In Progress!
June 2025 - Dec 2025

In 2025, cities, towns, and counties across the U.S. are uniting to ignite demand for carbon removal by collectively purchasing high-quality carbon removal services. This first-of-its-kind campaign empowers local governments and communities to take bold action, turning carbon removal from a niche concept into a community-driven movement.

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The Hudson Valley Biochar Pioneers

Completed
Dec 2025 - June 2025

We awarded grants to 15 farms in Upstate New York to apply biochar on cropland, demonstrating its power to store carbon and boost soil health.

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CDR + Liability Biomass

Completed
Dec 2023 - March 2024

This campaign turned wildfire-prone forest residues and urban organic waste into durable carbon removal through biochar and other emerging methods.

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CDR + Concrete

Completed
Dec 2022 - March 2023

With our inaugural campaign we supported projects that embedded CO₂ captured from the air into concrete, turning one of the world’s most common materials into a carbon sink.

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The Carbon Corner

Catch up on the latest news, reporting and commentary from our members, awardees, and partners.

Travertine’s Boulder Block: creating carbonate cement substitutes with industrial waste.

Josefina Hajek-Herrera
5 min read
Awardee Spotlight
With help from a 4 Corners grant, Travertine proved its carbon-removing material can stand up to concrete standards—and shake up one of the world's most carbon intensive industries.

Burying carbon: Woodcache’s wildfire solution gets a boost from 4 Corners.

Josefina Hajek-Herrera
5 min read
Awardee Spotlight
Woodcache PBC's wildfire-fighting, carbon-storing burial method just got a major boost from 4 Corners—and it’s already removing CO₂ and creating local impact in Colorado.

From air to block: CarbonBuilt’s bold vision to store CO2 in concrete.

Josefina Hajek-Herrera
5 min read
Awardee Spotlight
CarbonBuilt is turning mineralized CO₂ into a building block for concrete. Their Flagstaff pilot with Block-Lite will cut up to 3,000 tonnes of CO₂ annually.

Waste to removal: how Carba is redefining carbon removal with biochar.

Josefina Hajek-Herrera
5 min read
Awardee Spotlight
Carba, a 2024 4 Corners awardee, converts waste biomass into stable biochar using portable, low-energy reactors, enabling permanent carbon storage while reducing landfill emissions and transportation costs.
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