Stardust raises $60M to advance stratospheric technology aimed at blocking sunlight
Israeli-American startup Stardust Solutions has secured $60 million to develop a proprietary solar geoengineering system that would cool the planet by dispersing reflective aerosols into the stratosphere. The controversial approach aims to counter global warming by reducing the amount of sunlight reaching Earth’s surface.A new player in climate intervention technologies
Founded in 2023, Stardust Solutions is building one of the world’s first private platforms for climate-altering stratospheric aerosol injection. The company plans to use aircraft to release specially engineered particles capable of reflecting a portion of incoming sunlight. With a team of 25 physicists, chemists and engineers—many with backgrounds in Israeli defense labs—the startup positions itself as a high-tech climate contractor.The firm received $60 million in fresh funding from venture investors in October, adding to the $15 million previously provided by Awz Ventures, a fund with ties to Israeli intelligence and defense institutions.
Deployment targeted for the late 2020s
According to company plans, the core technology is expected to be ready for deployment before the end of the decade. Stardust intends to begin field tests in April 2026, marking one of the earliest real-world geoengineering trials by a private entity.The startup is also aggressively patenting its aerosol compounds, aircraft systems and delivery mechanisms, and describes itself as a “climate defense contractor” that intends to sell geoengineering capabilities to national governments.
A regulatory vacuum with global consequences
Critics argue that geoengineering remains almost entirely unregulated. No international body currently governs the deployment of stratospheric aerosol technologies, meaning a single government—or even a well-funded corporation—could conduct large-scale atmospheric experiments without global approval.Scientists warn that such actions could alter climate systems affecting billions of people, particularly in regions reliant on stable monsoon patterns across Asia and Africa. Potential risks include disruptions to food security, damage to the ozone layer and extreme shifts in weather behavior.
The “termination shock” problem
One of the most alarming scenarios involves an abrupt stop to aerosol deployment. If stratospheric injections suddenly cease, the planet could experience rapid and dangerous warming—known as termination shock—because greenhouse gas concentrations would remain high while the artificial cooling effect disappears.Researchers caution that once started, geoengineering could require continuous global commitment for decades or longer.
A technology racing ahead of policy
Stardust’s emergence highlights the accelerating gap between technological progress and global governance. Without international frameworks, states may pursue unilateral climate interventions, potentially triggering political conflict or environmental instability.As the company pushes forward, governments and scientific institutions face growing pressure to develop rules governing research, deployment and long-term consequences of planetary-scale climate manipulation.
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