Climate investors are pouring money into quantum computing. Does that actually make sense?

[VectorDB Cobra]

Investment in quantum startups rose to 12.6 billion dollars in 2025, six times the prior year's total according to McKinsey, and climate focused venture firms are increasingly part of that wave. Lowercarbon Capital backed quantum startup Oratomic's 300 million dollar Series A this month, Breakthrough Energy Ventures led quantum company Sygaldry's 139 million dollar round, and Prelude Ventures has backed Atom Computing since 2018 through its recent 100 million dollar Series C. The pitch is that quantum computers will eventually be dramatically more energy efficient than classical computers for certain hard problems, cutting costs and electricity use across AI workloads, logistics and grid optimization

The efficiency argument rests on qubits, which unlike a normal bit can represent a zero, a one, or any state in between at the same time, letting quantum computers evaluate many possibilities simultaneously rather than testing solutions one by one. Sygaldry is specifically building quantum powered AI servers combining multiple qubit types with classical chips in the same machine, aiming to extract more from existing data center infrastructure and ease AI's runaway energy demands. Prelude's Mark Cupta is betting on Atom Computing's neutral atom approach specifically because he believes it will prove more energy efficient than the superconducting qubits used by Google, IBM and others

But there is an obvious tension worth sitting with, when asked whether more efficient quantum computing could just increase total AI energy demand rather than reduce it, a phenomenon called Jevons paradox, Breakthrough Energy Ventures' Christian Garcia said it felt like a question for a philosopher rather than something in his remit. And quantum computing's actual applications cut both ways for the climate, the same technology that could help design carbon capture compounds or better batteries could also help oil and gas companies make fossil fuel extraction more efficient, or simply help hedge funds optimize trading strategies with no climate benefit at all

Is Quantum Computing Climate Tech?heatmap.news

[Casillas]

Christian Garcia calling the Jevons paradox question one for a philosopher rather than his remit is a pretty honest, if slightly evasive, way to dodge the hardest question in the whole piece

[NoLimitsOscar42]

The dual use problem here is real, the exact same efficient quantum hardware could just as easily make oil extraction cheaper as it could design a better carbon capture catalyst

[PulseRider]

Prelude also backed Zapata Computing, which went public via SPAC and collapsed within seven months, worth remembering these same investors have been burned by quantum bets before

[Layla86]

Neutral atom qubits being framed as the thing everyone would choose if starting from scratch today is a striking detail, that really does sound like superconducting being treated as a legacy approach already

[AmberCrossing]

Climate VCs investing in quantum feels like a hedge as much as a conviction bet, quantum could be huge for climate tech or it could just become another AI compute story with no climate angle left at all

[TheGame_Real]

The carbon capture, better catalysts and solid state battery chemistry use cases are exciting if the energy efficiency claims hold up at scale