Stardust Solutions raises $75M to develop solar geoengineering technology
What's the deal? Israeli startup Stardust Solutions has raised $75 million to develop solar geoengineering technology that reflects a portion of incoming sunlight back into space.
Founded by physicists including Prof. Eli WaxmanDealroom has a profile for this one. Try Dealroom →, Dr. Yanai YedvabDealroom has a profile for this one. Try Dealroom →, and Dr. Amiad SpectorDealroom has a profile for this one. Try Dealroom →, the company is building a silica-based particle for controlled release into the stratosphere.
Unlike conventional sulphur-based approaches, Stardust says its material minimises environmental risks while still cooling the planet.
Why now? The startup frames its technology as a temporary tool to slow global warming, not a replacement for cutting greenhouse gas emissions.
It estimates a full-scale deployment could stabilise global temperatures at roughly $20 billion a year — far below the projected cost of climate damage.
The round drew AWZ VenturesDealroom has a profile for this one. Try Dealroom →, whose advisory network includes former senior Israeli and North American intelligence officials.
What could go wrong? The project remains deeply controversial. Many climate researchers warn that altering the atmosphere at scale could shift rainfall patterns, hit agriculture, and trigger geopolitical disputes.
Independent scientists also question whether the particles have been tested under real stratospheric conditions, and stress that heavy international oversight would be needed before any deployment.
Stardust says it plans to spend the next three to five years on lab validation and small-scale experiments. Any decision to deploy, it adds, would rest with governments and regulators — not the company.
The signal: Stardust's leap to breakout stage signals that solar geoengineering — once confined to academic debate — is now drawing serious venture capital, with backers like AWZ VenturesDealroom has a profile for this one. Try Dealroom → betting on a technology whose ultimate deployment hinges on governments rather than markets.
Read more: Israeli Financial News
Image credit: NASA Goddard Photo and Video
