--- title: "Company plans solar geoengineering to cool Earth" publication: "MediaBias News" url: "https://mediabias.news/climate/company-plans-solar-geoengineering-to-cool-earth" api: "https://mediabias.news/api/v1/stories/company-plans-solar-geoengineering-to-cool-earth" markdown: "https://mediabias.news/climate/company-plans-solar-geoengineering-to-cool-earth.md" audio: "https://mediabias.news/api/audio/company-plans-solar-geoengineering-to-cool-earth" category: "Climate" published: "2026-09-08T21:45:46.977Z" source_reported: "2026-09-08T21:16:11.254Z" updated: "2026-09-08T21:45:46.977Z" trust_score: 42 critic_score: 57 hype_score: 60 assessment_type: "coverage-and-source-reporting-analysis" fact_check_status: "not-performed" coverage_measured: "2026-09-08T22:45:07.692708+00:00" --- # Company plans solar geoengineering to cool Earth *Stardust Solutions proposes spraying particles into the atmosphere, drawing both investment and scientific concern.* **Scores for the source reporting** (0-100, assessing the original journalism this article was written from, not this write-up): - Trust 42 of 100, higher is better. Central claim attributed to named CEO; one full report and 17 digests; no independent outlets cited. - Craft 57 of 100, higher is better. One full report, but most sources are digests; some sources lack specific details. - Hype 60 of 100, lower is better. Headlines use urgent language like 'raising red flags' and 'playing Russian roulette'. Scored by MediaBias News; method at https://mediabias.news/methodology. **The short version** - Stardust Solutions, an Israeli-US company, is developing solar geoengineering technology to cool the planet by spraying particles into the atmosphere. - The proposed method uses particles made from amorphous silica and calcium carbonate, with each million-ton deployment costing $10 billion and requiring annual replenishment. - Scientists have raised concerns about potential disastrous global implications, including altered weather patterns and human health impacts. - Experts are also worried about a for-profit company developing technology with potentially huge and unpredictable repercussions. Stardust Solutions, an Israeli-US company founded in 2023, is developing a method of solar geoengineering intended to cool the planet. The technology involves spraying particles into the atmosphere to reflect sunlight. The company's proposed particles are made from amorphous silica and calcium carbonate, substances found in food additives and eggshells respectively. According to the company, each million-ton deployment of these particles would cost approximately $10 billion and would need to be replenished annually. Scientists have expressed significant concerns about the potential implications of this technology. These include the possibility of disastrous global consequences such as altered weather patterns and adverse human health impacts. Some experts are particularly wary of a for-profit company developing technology that could have vast and unpredictable repercussions on a global scale. ## Disagreement on particle safety While Stardust Solutions claims its particle design accounts for risks like the "hitchhiker hypothesis", where particles could pick up harmful substances, and that silica is considered safe, some experts remain unconvinced. David Keith, a professor of geophysical sciences, stated that Stardust is "greatly overclaiming to say that they’re confident the risks [of their particles] are lower than with sulfur." Kelly Wanser, executive director of SilverLining, noted that it remains unclear how the particles will behave at scale in the atmosphere. ## What the coverage left out None of the left- or centre-rated reports mention the specific figure of $75 million that Stardust Solutions has raised from investors, a detail present in the full report from KIFI. ## Who covered it Shares of the 13 covering outlets with a published leaning rating: - Left: 31% (4) - Centre: 69% (9) - Right: 0% (0) 5 of 18 covering outlets carried no usable leaning rating and were excluded from those percentages. Coverage measured 2026-09-08T22:45:07.692708+00:00. **Coverage watch:** developing. Checked 5 times; 0 checks found a material change. Most recently checked 2026-09-08T23:00:07.503Z. ## How the sides framed it ### Left - Left-rated reports highlighted the controversial nature of solar geoengineering and the potential for negative global consequences. Politico noted that the company aims to "make billions of dollars" through its plan to block sun rays. EU Observer stated that "blocking the sun to cool the planet is bound to go wrong," emphasizing the need for decades or centuries of maintenance and a "zero" margin of error. Heatmap.news featured an interview with Stardust Solutions CEO Yanai Yedvab, while CNN and Politico both mentioned scientists raising red flags about the technology's potential impacts. ### Centre - Centre-rated reports focused on the company's proposal and the scientific warnings it has generated. Multiple outlets, including KIFI, Washington Top News, KRDO, KVIA, KEYT, KMIZ, KESQ, and kioncentralcoast.com, used similar phrasing, stating that the company "says it can help cool the planet for $10 billion a year; scientists are raising red flags." The Times of Israel reported that the company is "aiming to cool the Earth with masses of tiny particles" but that critics warn of dangers in "playing with weather." ### Right No separate framing summary. ## Factuality profile of the covering outlets These are published factuality ratings of the outlets, not a verdict on whether this story or its claims are true. - high: 11 - unknown: 5 - veryHigh: 2 ## Verification scope This page compares coverage and scores the source reporting. It is not a ClaimReview verdict on whether the underlying event or claim is true. ## Original reporting this was written from - [Politico](https://politico.com/news/2026/05/15/a-closely-guarded-plan-to-cool-earth-is-revealed-00920438) — A closely guarded plan to cool Earth is revealed - [The Times of Israel](https://timesofisrael.com/israeli-tech-company-aiming-to-cool-the-earth-with-masses-of-tiny-particles-report) — Israeli tech company aiming to cool the Earth with masses of tiny particles - [Duurzaamnieuws](https://duurzaamnieuws.nl/zonlicht-tegenhouden-om-de-planeet-af-te-koelen-russische-roulette-spelen-met-het-klimaat) — Blocking Sunlight to Cool the Planet: Playing Russian Roulette with the Climate - [CNN Brasil](https://cnnbrasil.com.br/ciencia/uma-empresa-afirma-ter-descoberto-a-maneira-de-resfriar-o-planeta-por-us-10-bilhoes-com-mineral-de-casca-de-ovo-mas-cientistas-soam-o-alerta) — One Company Claims to Have Discovered How to Cool the Planet for $10 Billion with Eggshell Ore, but Scientists Sound the Alert - [skai.gr](https://skai.gr/news/world/etaireia-isxyrizetai-oti-mporei-na-drosisei-ton-planiti) — Global Warming: Company Claims It Can Cool the Planet - [Washington Top News](https://wtop.com/world/2026/09/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags – WTOP News - [mezha.net](https://mezha.net/eng/news/b5b861de_stardust_solutions_develops) — Stardust Solutions Develops Solar Geoengineering to Cool Earth as Scientists Warn of Global Risks - [CNN](https://cnn.com/2026/09/08/climate/solar-geoengineering-stardust-solutions-cool-planet) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [KIFI](https://localnews8.com/cnn-other/2026/09/08/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [KRDO](https://krdo.com/news/2026/09/08/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [KVIA](https://kvia.com/cnn-other/2026/09/08/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [KEYT](https://keyt.com/news/national-world/cnn-other/2026/09/08/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [KMIZ](https://abc17news.com/cnn-other/2026/09/08/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [KESQ](https://kesq.com/cnn-other/2026/09/08/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [kioncentralcoast.com](https://kioncentralcoast.com/cnn-other/2026/09/08/this-company-says-it-can-help-cool-the-planet-for-10-billion-a-year-scientists-are-raising-red-flags) — This company says it can help cool the planet for $10 billion a year; scientists are raising red flags - [heatmap.news](https://heatmap.news/podcast/shift-key-s3-e58-stardust) — The Company That’s Raised $60 Million to Geoengineer the Planet - [latitudemedia.com](https://latitudemedia.com/news/catalyst-inside-the-most-sophisticated-plan-for-solar-geoengineering) — Inside the most sophisticated plan for solar geoengineering - [EU Observer](https://euobserver.com/217619/why-blocking-the-sun-to-cool-the-planet-is-bound-to-go-wrong) — Why blocking the sun to cool the planet is bound to go wrong ## Questions **What is Stardust Solutions' plan to cool the planet?** Stardust Solutions, an Israeli-US company, plans to use solar geoengineering by spraying particles made from amorphous silica and calcium carbonate into the atmosphere. The goal is to reflect sunlight and reduce global temperatures. **How much would Stardust Solutions' plan cost?** The company estimates that each million-ton deployment of particles would cost approximately $10 billion. This would need to be replenished annually, according to Stardust Solutions. **What are the main concerns raised by scientists?** Scientists are concerned about potentially disastrous global implications, including altered weather patterns and human health impacts. There is also apprehension about a for-profit company developing technology with unpredictable repercussions. --- MediaBias News — https://mediabias.news. Reproduced from https://mediabias.news/climate/company-plans-solar-geoengineering-to-cool-earth. Please cite as: MediaBias News, "Company plans solar geoengineering to cool Earth", https://mediabias.news/climate/company-plans-solar-geoengineering-to-cool-earth