Climate Tech Firms Rush to Critical Minerals as Trump Administration Stalls Decarbonization Efforts

Climate tech companies are pivoting rapidly to critical minerals to survive the Trump administration's diminished support for climate causes, marking a strategic shift that prioritizes cash flow over carbon cuts.

Boston Metal, known for its green steel technology, has raised $75 million from investors to expand its business producing niobium, tantalum, and other metals deemed critical by the U.S. government. The company's molten oxide electrolysis process—used to make steel without fossil fuels—is now being repurposed for higher-margin metals.

“By deploying in the critical metals industry where we can go very fast, we generate the resources to continue with the development of steel,” said Tadeu Carneiro, CEO of Boston Metal. The pivot could help the startup survive long enough to eventually tackle steel's massive emissions.

Background

The steel industry is notoriously difficult to decarbonize: it operates at enormous scale, and the product itself commands a low price. With the Trump administration cutting federal support—the Department of Energy recently canceled $1.3 billion in cement-related funding—companies like Boston Metal are seeking alternative revenue streams.

Other climate tech firms are following a similar playbook. California-based Brimstone, which developed a new process for low-carbon cement, saw one of its DOE awards canceled last year. The company now emphasizes that its technology also produces smelter-grade alumina, a critical material for U.S. aluminum production.

“At the time, the company saw the cancellation as a misunderstanding,” a Brimstone representative previously told MIT Technology Review. The facility the funding was meant for would make both cement and alumina, supporting domestic supply chains.

What This Means

This shift highlights a broader survival strategy: focusing on politically popular areas like critical minerals and energy abundance can generate the cash needed to keep clean-tech ventures alive. While producing niobium won't have the same climate benefit as cutting steel emissions, it may provide a financial lifeline in a hostile policy environment.

For Boston Metal, success in critical metals could fund further steel reactor development. For Brimstone, alumina production offers a path around canceled grants. The trend underscores how climate tech is adapting to political reality, betting that short-term profits from critical minerals will enable long-term decarbonization.

Other startups, including Sublime Systems, have also lost DOE awards amid the broader funding freeze. As the administration prioritizes fossil fuels, the ability to pivot to high-value materials may determine which climate companies survive the next four years.