Israeli climate technology startup Stardust Solutions has emerged as one of the world's most closely watched companies in the field of solar geoengineering after raising $75 million to develop technology designed to reduce global temperatures by reflecting a small portion of incoming solar radiation into space.
Founded by leading Israeli physicists, including Prof. Eli Waxman, Dr. Yanai Yedvab, and Dr. Amiad Spector, the company is developing a proprietary silica-based particle intended for controlled release into the Earth's stratosphere. Unlike conventional sulfur-based approaches, Stardust says its material is designed to minimize environmental risks while providing an effective cooling effect.
The company argues that the technology is not a replacement for reducing greenhouse gas emissions but rather a temporary tool to slow global warming while governments continue transitioning to cleaner energy sources.
Stardust estimates that, if proven safe and effective, a full-scale deployment could stabilize global temperatures at an annual cost of roughly $20 billion—far below the projected economic damage associated with accelerating climate change.
The startup has attracted investment from several international funds, including AWZ Ventures, whose advisory network includes former senior officials from Israeli and North American intelligence agencies. The company has also established research collaborations with universities and atmospheric scientists in Israel, Europe and North America.
However, the project remains highly controversial within the scientific community. Many climate researchers warn that large-scale manipulation of the atmosphere could produce unintended consequences, including changes in global rainfall patterns, impacts on agriculture, and geopolitical disputes over climate intervention.
Independent scientists have also questioned whether the company's proprietary particles have been sufficiently tested under real stratospheric conditions and emphasize that extensive international oversight and regulation would be required before any operational deployment.
Stardust says it plans to spend the next three to five years completing laboratory validation and small-scale atmospheric experiments before governments consider any future operational use. According to the company, any decision to deploy the technology would ultimately rest with national governments and international regulatory bodies—not with the company itself.
The project highlights a growing global debate over whether solar geoengineering should become part of humanity's response to climate change, balancing the promise of rapid cooling against significant scientific, environmental and ethical uncertainties.
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