The race to dim the sun
As climate risks escalate, a new frontier is emerging — private companies experimenting with blocking sunlight to cool the planet.
Start-ups like Make Sunsets and Stardust are moving faster than governments or universities, raising millions to test “solar geoengineering” technologies. Supporters argue that entrepreneurs can innovate quickly. Critics warn that profit-driven climate tinkering could create global risks we don’t yet understand.
With little regulation and growing investor interest, the debate is clear: Who gets to decide whether we dim the sun — and how do we ensure global safety, transparency, and accountability?
