Our Take
Climate tech companies aren't solving harder problems; they're chasing easier money while federal support evaporates.
Why it matters
The US has canceled $1.3 billion in cement-related funding in one year alone. Startups in heavy industry now face a choice: pivot to politically favored supply chains or fold. This signals how quickly policy shifts can hollow out technical progress in decarbonization.
Do this week
Energy and climate investors: audit your portfolio's dependency on federal incentives; identify which companies have genuine alternate revenue paths versus those gambling on critical minerals as a bridge.
Boston Metal shifts strategy to survive
Boston Metal, a steelmaking startup known for molten oxide electrolysis to reduce emissions, raised $75 million from new and existing investors. The company announced it is deprioritizing steel production and moving aggressively into critical metals including niobium, tantalum, chromium, and vanadium (company-reported). These metals are used in aircraft engines and high-end alloys and are classified as critical by the US government.
The company's CEO, Tadeu Carneiro, framed the shift explicitly: "By deploying in the critical metals industry where we can go very fast, we generate the resources to continue with the development of steel." One year ago, Boston Metal announced a pilot reactor in Massachusetts producing a literal ton of steel. Now the focus has moved sideways.
Boston Metal is not alone. Brimstone, a cement startup, saw the Department of Energy cancel $1.3 billion in cement-related funding last year, including one of Brimstone's own awards. The company pivoted, prominently highlighting its production of alumina (a critical mineral) alongside cement. Sublime Systems, another cement player covered by the source, faced the same cancellation. Carbon dioxide removal startups are exploring partnerships with mining operations, framing their work as efficiency improvements or site remediation for active and abandoned mines.
A strategic retreat from the hard problem
Steel and cement are responsible for roughly 16% of global CO2 emissions combined. Both industries operate at massive scale with razor-thin margins. Decarbonizing them requires sustained R&D funding and patient capital. Neither exists in sufficient quantity in the current US political environment.
The pivot to critical minerals is rational at the company level. Niobium, tantalum, chromium, and vanadium command higher prices per ton than steel. Government procurement priorities now favor supply-chain security over emissions reductions. A startup can achieve cash flow and runway much faster by selling metals to aerospace and defense than by trying to win market share in commodity steel.
But the aggregate effect is a hollowing-out. The hardest decarbonization work—the stuff that moves the needle on climate—gets deprioritized. Companies keep the technical teams and intellectual property in reserve, but the operational focus and investment shift to what pays now. The source reporter explicitly worries: "I worry that if we keep too quiet on climate, companies might lose the plot and make choices that won't help cut emissions."
Track the funding shift
If you manage climate tech investments or operate in heavy industry, the message is unambiguous: federal support for decarbonization in the US is contracting, not expanding. Companies that can generate revenue outside decarbonization will survive. Those that cannot will either pivot or die.
Watch for two things. First, how long the "bridge" actually lasts. Companies claim critical minerals funding buys time for steel R&D; verify whether that R&D resumes or becomes a permanent footnote. Second, whether international funding or carbon credits can replace the vanished US incentives. If neither fills the gap, technical progress in hard decarbonization will slow measurably over the next 18 months.