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Sublime Systems Lands $87 Million Funding from DOE for Low-Carbon Cement

Sublime Systems, a startup pioneering a revolutionary method of producing fossil-fuel-free cement, has been chosen by the U.S. Department of Energy’s Office of Clean Energy Demonstrations (OCED) to start negotiations for up to $87 million in funding under the Bipartisan Infrastructure Law and Inflation Reduction Act. 

The funding, part of the Industrial Demonstrations Program, aims to support projects like Sublime’s First Commercial Electrochemical Cement Manufacturing initiative. Selected among 33 projects spanning over 20 states, these initiatives collectively receive up to $6 billion to showcase their commercial-scale decarbonization solutions. 

These efforts are crucial for transitioning energy-intensive industries towards net zero emissions. They can also help bolster local economies, generate high-quality jobs, and mitigate harmful emissions detrimental to public health. 

Cement’s Carbon Challenge

To understand the innovative strides of Sublime Systems, it’s crucial to grasp the conventional cement-making process and its environmental hurdles.

Cement, when mixed with water, sand, and gravel, constitutes concrete, the second most consumed substance globally after water. This process has remained largely unaltered for centuries. 

Unfortunately, producing traditional cement contributes significantly to carbon emissions, accounting for about 8% of the world’s total emissions. That’s because using ordinary Portland cement (OPC) process to manufacture traditional cement relies on fossil-fueled kilns operating at extreme temperatures. 

This is what Sublime Systems will try to address. Founded in 2020, the Massachusetts-based company works with a clear mission – to revolutionize cement production and mitigate its environmental impact. Here’s the Sublime process of cement manufacturing:

Sublime Systems green cement production

Through innovative electrochemical processes, Sublime has scaled up its cement manufacturing to a pilot capacity of 250 metric tons per year (TPY). The forthcoming commercial facility in Holyoke will be capable of producing up to 30,000 TPY of Sublime Cement™. It’s slated to open as early as 2026, boasting significant reductions in fossil fuel pollution typically associated with industrial growth.

Sublime Systems’ approach hinges on two primary innovations: electrochemical reactions and renewable energy integration. 

Instead of traditional methods that rely on high temperatures, Sublime employs electrochemical reactions to produce cement. This revolutionary approach eliminates the need for burning fossil fuels, thereby significantly reducing carbon emissions.

Then by using electricity to power these reactions, Sublime’s plants have the potential to integrate renewable energy sources such as solar and wind. This strategic shift reduces emissions and aligns with renewable energy goals, contributing to a more sustainable future.

Other companies are creating innovative ways to capture carbon dioxide to make it as an ingredient in its cement-free, carbon-negative concrete.

Sublime Systems’ Path to Sustainable Cement Production

Dr. Leah Ellis, CEO and Co-Founder of Sublime Systems highlighted the biggest hurdle hindering this kind of breakthrough innovation in fighting climate change, saying:

“Access to sufficient capital for industrial-scale demonstrations is the single biggest obstacle preventing breakthrough innovations from reaching the scale humanity needs to combat the climate crisis.”

Ellis praised the Department of Energy for addressing this obstacle through funding from OCED’s Industrial Demonstrations Program (IDP). She expressed excitement about collaborating with the department on funding their first commercial manufacturing scale-up. It would be able to produce clean cement while fostering economic opportunities for the surrounding community.

Furthermore, OCED applicants, including Sublime Systems, were mandated by the DOE to submit Community Benefits Plans (CBPs). These plans outline strategies to engage communities, create high-quality jobs, and prioritize economic and environmental justice for disadvantaged groups. 

In Sublime’s case, their decision to establish their first commercial manufacturing facility in Holyoke, Massachusetts was guided by screening tools developed by Justice 40. The startup anticipates the creation of hundreds of jobs during the construction phase of the project. 

The company has forged a strategic partnership agreement with the United Steelworkers (USW), representing approximately half of unionized cement workers in the U.S., focusing on operational roles in the Holyoke plant. Additionally, Sublime has entered into a Memoranda of Understanding to negotiate project labor agreements with building trade unions in the region for the construction phase.

Sublime Systems’ Holistic Approach

Augmenting Sublime’s Community Benefits Plan is a collaboration with the Smithsonian Science Education Center (SSEC). The OCED selection includes funding to leverage SSEC’s educational programming resources to support this objective.

U.S. Secretary of Energy Jennifer M. Granholm emphasized the critical role of advancing decarbonization technologies in pivotal industries such as steel, paper, concrete, and glass. She underscored the significance of President Biden’s industrial strategy, facilitating the Department of Energy’s (DOE) historic investment in industrial decarbonization. 

Granholm highlighted the aim to substantially reduce emissions from hard-to-decarbonize sectors, ensuring that American businesses and workers remain competitive on the global stage.

Sublime has already secured reservations for over 45,000 tons of Sublime Cement™, demonstrating strong demand for their sustainable cement.

Sublime Systems’ selection for funding under the U.S. Department of Energy’s IDP marks a significant step towards revolutionizing cement production. With innovative electrochemical processes and a commitment to community engagement, Sublime is poised to lead the way in decarbonizing the cement industry, fostering economic growth, and advancing environmental sustainability.

The post Sublime Systems Lands $87 Million Funding from DOE for Low-Carbon Cement appeared first on Carbon Credits.

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The Strategic Case for Nature-Based Carbon Investments

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Nature-based carbon investments deserve consideration when they address a specific business dependency and produce outcomes you can measure. Imagine Moonbucks, a global coffee roaster planning next season’s espresso blend. It is considering natural Grade 4 coffee from Jimma, in southwestern Oromia, Ethiopia. Its sourcing decisions affect the roasting schedule and the cash tied up in coffee purchases. Moonbucks needs to understand which measures could protect that supply, what they would cost and how it would judge the results.

1. Define the sourcing problem before choosing a project

Moonbucks needs a dependable component for its espresso blend. Its procurement team wants continuity of volume and an agreed cup profile. Replacing a shipment at short notice could require new sample approval and changes to the blend, and given the schedules for cultivation, processing, and freight delivery, is practically impossible. Moonbucks needs to get this right, and its initial concern is inconsistent deliveries. It commissions an assessment of the supplying farms and post-harvest chain. The questions cover land condition, harvest availability and whether drying or storage problems are affecting saleable lots.

This distinction changes the investment brief. A tree-planting proposal cannot be assumed to fix drying problems. Better storage cannot restore eroded land. The team must establish which problem exists before selecting the response.

CCC’s guide to finding nature-based solutions in your supply chain explains where to look. Here, the next task is to turn a broad concern into a testable proposal.

2. Develop nature-based carbon investments around the actual supply chain

The assessment would trace Moonbucks’ purchases back through the exporter and supplying producer groups. Which farms supply the contracted lots? Who controls land-management decisions? How long does the buyer expect to maintain the purchasing relationship?

Furthermore, Jimma natural Grade 4 cannot be treated as interchangeable with every Ethiopian coffee. Moonbucks would need to test any substitute against its own blend and quality requirements.

Suppose Moonbucks’ assessment identifies an opportunity to maintain shade trees and restore vegetation along exposed streambanks. The IPCC describes agroforestry as a way to store carbon in vegetation and soil, with potential benefits for erosion control and water quality.1 Moonbucks would need local advice on species, growing conditions and maintenance before deciding how these measures fit its sourcing plan.

The proposal now has a defined sourcing connection and a candidate intervention. The next steps are to test its effect on production, assess carbon eligibility and build the financial case.

3. Compare the proposal with other ways to protect supply

WBCSD’s Nature-based Solutions Blueprint recommends comparing nature-based options with other responses across their benefits and costs.2 For Moonbucks, that means evaluating the landscape proposal alongside drying improvements, storage controls and alternative sourcing arrangements.

The product’s natural-process designation matters. Moonbucks should examine the drying and dry-milling chain alongside land conditions. Its team would check storage practices, contamination risks and incoming-lot quality to see whether problems arise before or after the coffee leaves the farms.

The revised proposal might combine land stewardship with separate post-harvest controls. Each component needs its own purpose and budget. A sustainability label should not obscure which activity is expected to solve which problem.

The project develops as the evidence improves. Its scope should follow the diagnosis rather than preserve the first idea unchanged.

4. Establish what the carbon outcome could count toward

Moonbucks’ sustainability team now tests the proposed carbon case separately from the sourcing case. Is the objective a measurable change in Moonbucks’ value-chain emissions, verified credits for separate voluntary use, or distinct outcomes under carefully defined arrangements?

Scope 3 covers value-chain emissions. A purchasing relationship alone does not prove that a farm intervention can be included in Moonbucks’ inventory. The team needs an applicable accounting method, defensible boundaries and evidence supporting attribution.

SBTi’s FLAG Guidance (forest, land and agriculture), version 1.2, says purchased credits used as offsets cannot meet near-term FLAG or energy and industry targets. Eligible land-based removals are subject to accounting requirements.3 Moonbucks needs to test its proposal against those rules before including an outcome in its targets.

For Moonbucks’ Jimma proposal, maintaining existing trees and establishing new vegetation could involve different carbon questions. Specialists must examine the baseline and additionality, meaning what changes because the project proceeds. They must also assess measurement and the risk that stored carbon is lost. CCC’s MRV and additionality article introduces those tests.

Until that work is complete, Moonbucks should not budget an assumed Scope 3 reduction or credit-sale receipt. Direct emissions reductions remain the priority.

5. Build a financial case that survives weaker assumptions

Moonbucks’ finance team would now build a multi-year budget. UNEP’s State of Finance for Nature 2023 compares current finance with the investment needed to meet climate, biodiversity and land-restoration goals.4 The company would cost its proposed activities, farmer participation and ongoing monitoring. Verification, where required, is a separate expense. Maintenance and responsibility for replacing failed plantings must remain visible after the initial establishment budget ends.

Operational benefits need equally careful treatment. If fewer rejected lots reduce emergency purchasing, count that saving once. Do not add “supply resilience” as another financial benefit when it represents the same avoided cost.

Moonbucks should compare a base case with slower benefits, higher implementation costs and no carbon revenue. It should also distinguish production outcomes from quality and shipment outcomes. A single good harvest would not prove that the landscape intervention caused better delivery performance.

A project can remain worth funding even when its carbon case needs more work. That decision must rest on the operational evidence and the company’s objectives, without unsupported environmental claims.

6. Fund a pilot with a clear expansion decision

Moonbucks’ first approval would fund a bounded pilot, rather than commit the entire sourcing program. Before spending, Moonbucks would agree on participating farms, responsibilities and the evidence needed at review.

Its scorecard could track farmer participation, implementation costs and plant survival, alongside accepted coffee volumes and lot-quality results. Carbon measurements would follow the selected method. Farm-level traceability must connect the intervention to the actual sourcing relationship.

Suppose Moonbucks’ review later finds that storage changes explain most quality improvements, while the land measures need longer observation. Those findings would shape the next decision: expand the proven component, adjust the landscape work or pause further spending. They would not justify crediting all improvements to tree planting.

This gives nature-based carbon investments a practical place in a multi-year strategy. Funding increases as the evidence supports it, and the project can change direction before a larger commitment.

Discuss a sourcing opportunity with CCC

Carbon Credit Capital’s nature-based supply-chain investment service uses its Dual-Value Model to examine supply-chain economics alongside potential sustainability outcomes.

Schedule a consultation to discuss your sourcing exposure and the questions to resolve before allocating capital.

Sources

  1. Intergovernmental Panel on Climate Change (IPCC), Climate Change 2022: Mitigation of Climate Change, Chapter 7, Agriculture, Forestry and Other Land Uses, section 7.4.3.3 (Agroforestry).
  2. World Business Council for Sustainable Development (WBCSD), Nature-based Solutions Blueprint, 5 June 2024.
  3. Science Based Targets initiative (SBTi), Forest, Land and Agriculture Science-Based Target-Setting Guidance, version 1.2, March 2026, section 3.1.4, pp. 37–38.
  4. United Nations Environment Programme (UNEP), State of Finance for Nature 2023, 2023.
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Carbon Footprint

How to buy plastic credits, and what to check before you do

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A plastic credit funds the collection of plastic waste in places where no formal system exists to collect it. Each credit represents a measured, independently audited quantity of plastic taken out of the environment or returned to use, tracked on a public registry.

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Carbon Footprint

EU carbon credit claims after 27 September 2026

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EU carbon credit claims changed on 27 September 2026, the day the Directive (EU) 2024/825 began to apply across the European Union. The change is narrow. It changes how a company can talk about the credits it buys. A product can no longer be called neutral on the strength of compensation alone; however, every specific, evidenced statement about what a company measured, reduced, and funded stays fully available.

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