Stardust Solutions

Stardust Solutions emerged in the early 2020s as a US-Israeli startup dedicated to commercializing Stratospheric Aerosol Injection. The company aims to deploy microscopic silica spheres into the stratosphere to reflect sunlight away from Earth, creating a temporary cooling effect that could buy humanity time to achieve net-zero emissions. Unlike earlier concepts relying on sulfur dioxide, Stardust claims its proprietary material is safer and reversible, posing no threat to the ozone layer or human health.

Co-founded by Janos Pasztor, a former UN Under-Secretary-General for Climate Change, the organization emphasizes a governance-first approach. Leadership asserts they will sell their Sunlight Reflection Technology exclusively to sovereign nations and international bodies rather than private entities. This strategy seeks to mitigate geopolitical risks associated with unilateral climate manipulation while navigating the complex regulatory void surrounding private sector geoengineering.

The startup secured $60 million in funding during October 2025, bringing its total capital raised to approximately $85 million by late 2025. Despite significant criticism from environmental groups regarding the potential for unregulated weather modification, the company maintains its timeline to begin outdoor field experiments in April 2026. They estimate global deployment would cost roughly $10 billion annually, a figure intended to be manageable for governments facing accelerating climate impacts. [edit]