News Summary

• Stardust Solutions, an Israeli-US company, is pushing ahead in the race to develop solar geoengineering.
• It aims to artificially bring down global temperatures by dimming the sun.
• The company has produced two particles: One from amorphous silica, commonly used as an anti-caking additive in foods, toothpaste and cosmetics.
• The other is made from a core of calcium carbonate, the main component in eggshells, surrounded by a shell of amorphously silica.