Stardust geoengineers propose to lower the planet's temperature by dispersing light-scattering "sand" into the stratosphere

Stardust Solutions – a startup company working on “solar” geoengineering

What it does Purpose Stop global warming and cool the planet.
Mechanism Spraying tiny aerosols in the stratosphere that reflect sunlight.
Technology Amorphous silicon dioxide (particle size – 0.5 µm).

Funding and support
- Investment amount: $75 million from U.S.–Israeli investors.

- Collaboration condition: Governments must agree to pay for spraying millions of tons of aerosols into the stratosphere.

How the company works with the scientific community
1. Confidentiality – initially plans were classified; scientists signed non‑disclosure agreements.

2. Disclosure of composition – the material (amorphous silicon dioxide) and particle size are now known.

3. Testing – six scientific papers have been published in collaboration with leading universities; they have not yet undergone peer review.

4. Patenting – the company is trying to protect its technologies for business strategy implementation.

Technical details
Particle type Features
Biocompatible type Ready for mass production, passes advanced testing.
With a calcium carbonate core Blocks sunlight more effectively.
- After settling, particles return to natural cycles.

- Amorphous silicon dioxide differs from reactive crystalline dust; according to WHO data, at low doses it poses no danger to humans.

Plans and challenges
Phase Date Expected outcome
Global deployment 2035 Profit $1.5 billion per year (plan revised).
- Geoengineering criticism – some scientists fear that without international cooperation the technology could be misused.

- Limitations – geoengineering can only mitigate warming; the root cause remains fossil‑fuel combustion. Long‑term solutions require reducing carbon emissions and cleaning the atmosphere.

Conclusion
Stardust Solutions offers a technology based on spraying silicon micro‑particles into the stratosphere to reflect sunlight. The company has attracted significant investment, disclosed particle composition and deployment plans, but faces scientific criticism and must prove the safety and effectiveness of its idea.