An Israeli tech company, Stardust Solutions, has unveiled its geoengineering approach to combat global warming by using microparticles to reflect sunlight. Previously secret, these particles are made of amorphous silica and calcium carbonate. The company, founded in 2023 and led by ex-nuclear program officials, has published initial research and is seeking to test its particles at high altitudes.
The aim is to cool the Earth by dispersing millions of tons of biodegradable particles, which could potentially reflect up to 1% of sunlight. However, the initiative has sparked criticism; over 600 scientists have called for a global ban on geoengineering, citing concerns over unforeseen consequences and its impact on emission reduction efforts. Critics, like Prakash Kashwan from Brandeis University, warn that such geoengineering could disrupt weather patterns, affecting agriculture and economies, especially in vulnerable regions. Stardust Solutions has raised $75 million and is registered in the U.S., with plans for outdoor testing contingent on government regulations.
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