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Low-carbon cement startups allied with Amazon and Microsoft lose federal funding

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08 Jun, 2025

This post was originally published on Green Biz

Source: Green Biz

The Department of Energy’s plan to cut $3.7 billion in Office of Clean Energy Demonstrations (OCED) awards strips funding from two startups that have scored high-profile deals with Microsoft and Amazon to decarbonize data center construction.

The DOE cuts came after a financial review ordered by President Donald Trump. So far, it impacts 24 projects — most related to carbon capture and storage — planned by a range of companies that also includes Diageo, ExxonMobil, Kohler and Kraft Heinz. About two-thirds of the projects were signed between Election Day and late in President Joe Biden’s term.

The cuts came as a surprise to the two startups, Brimstone Energy and Sublime Systems. “Given our project’s strong alignment with President Trump’s priority to increase U.S. production of critical minerals, we believe this was a misunderstanding,” said a Brimstone spokesperson.

Sublime, which also talked up its U.S. manufacturing plans in a statement about the cancellation, told Trellis that it is “evaluating various scenarios that leave our scale-up unimpeded.” Through a spokesperson, the company appealed to policymakers who “recognize that investing in American-invented breakthrough industrial technologies can address multiple policy priorities in tandem to the benefit of Americans from all walks of life.”

$15 billion at stake

The DOE is examining close to 180 grants and awards worth approximately $15 billion that would replace fossil-fueled industrial heating equipment, scale up carbon capture and address other hard-to-abate processes.

The agency’s OCED, which is slated for closure, had planned to award $1.6 billion to six projects aimed at reducing the emissions associated with cement by 4 million metric tons annually. The industry accounts for about 5.5 percent of all greenhouse gas emissions.

Four of the projects announced by OCED in March 2024, including those involving Sublime and Brimstone, were terminated by Energy Secretary Christopher Wright on May 30. They are:

  • Brimstone was supposed to receive up to $189 million to build its first commercial-scale factory in an as-yet-undisclosed location. It is closely allied with Amazon, which has backed it through the Climate Pledge Fund. Brimstone uses calcium silicate rocks instead of limestone for production, which cuts emissions and also produces critical minerals such as alumina.
  • Sublime, which announced a deal with Microsoft for a new carbon credit a week before the cancellation, was expecting $87 million to help build a factory in Massachusetts. The company uses an electrochemical process instead of a combustion-driven kiln to make a substance that can replace ordinary portland cement. 
  • National Cement, which is investing $500 million on a plant in California, was anticipating a DOE match of that amount. It’s a multifaceted project: the company wants to commercialize blended cement that uses calcined clay to produce limestone. It also plans a carbon capture and storage installation at the facility.
  • Heidelberg Materials in Louisiana was selected for up to $500 million to install carbon capture technology at a new plant in Mitchell, Indiana. Massachusetts. The company uses an electrochemical process instead of a combustion-driven kiln to make a substance that can replace ordinary portland cement.  

The fate of two other projects is unclear. Roanoke Cement could receive up to $61.7 million for an approach that minimizes the use of clinker, which is the most carbon-intensive part of cement production. Summit Materials, which is developing ways to replace limestone with local clay, has been in negotiations for up to $215.6 million.

[Get equipped with strategies to harness the power of capital for the clean economy transition at GreenFin, Oct. 28-30, San Jose.]

The post Low-carbon cement startups allied with Amazon and Microsoft lose federal funding appeared first on Trellis.

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Food waste action reduces methane emissions

Food waste action reduces methane emissions

An NZ food waste reduction initiative is providing an extra 12,000 meals per day and helping prevent climate-warming methane emissions from food going to landfill.

New results, released by the Kai Commitment, show that organisations involved in the food waste reduction program — which includes major New Zealand food businesses such as Woolworths NZ, Goodman Fielder, Fonterra, Silver Fern Farms, Foodstuffs and Nestlé NZ — increased food rescue volumes by 73% over the past year, totalling almost 13 million meals.

The data also revealed a 3% reduction in food going to landfill, helping prevent emissions from methane, a greenhouse gas said to be around 25 times more powerful than carbon dioxide. This data enables estimation of methane emissions reduction across New Zealand, in line with the New Zealand Government’s methane reduction priorities under the second Emissions Reduction Plan (ERP2), which aims to reduce biogenic methane by 10% by 2030.

Kaitlin Dawson, Executive Director of the Kai Commitment, said the results show that food waste reduction is a powerful lever for food insecurity and climate action, and targeted measurement and action in this space has an important role to play in helping the country meet its local and international climate targets.

“Food sector organisations have a crucial role in reducing food waste, and when supported with the right tools and frameworks, they can be a genuine force for good. We’re seeing businesses step up, take responsibility, and … deliver real impact for our community and climate,” Dawson said.

The results follow the NZ Government’s 2025 Budget announcement, which committed $15 million to support food redistribution. At the same time, food insecurity continues to rise across New Zealand. According to the Ministry of Health, one in four children (27.0%) now live in households where food runs out often or sometimes. For Pacific children, that figure is over half (54.8%); for Māori children, it is one in three (34.3%).

“With mounting financial pressures and increasing food insecurity, ensuring that good food is not wasted and gets to those who need it has never been more critical. At the same time, businesses have a unique opportunity to directly contribute to New Zealand’s national climate targets by embedding food waste reduction across their operations,” Dawson said.

Since its launch two years ago, the Kai Commitment program has helped businesses implement stronger food waste measurement, improve stock handling practices, and integrate food waste principles into operations and culture.

Key achievements include:

All participating businesses now integrate food loss and waste (FLW) into staff training.
43% of businesses have established FLW key performance indicators, up from just 14% in the first year.
71% of businesses now manage waste according to the food waste hierarchy, prioritising reuse and rescue over landfill.
Edible food waste reduced by 54%.
Expired stock to waste destinations reduced by 24%.
An 83% increase in surplus food revenue was recorded, returning an additional $3.6 million to food businesses.
 

“These results show what’s possible when we work together to deliver impact,” Dawson said. “As we grow the Kai Commitment, we’re focused on scaling that impact supporting more organisations to reduce food waste, cut emissions, and contribute to a stronger, more resilient food system for Aotearoa.”

Image credit: iStock.com/Dragos Condrea

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