Blotting out the sun might not fix climate change, but it could pause the warming process. The idea of using planes to “geoengineer” the climate by spreading sunlight-reflecting aerosols throughout the earth’s atmosphere is controversial. It is also becoming closer to reality.

Stardust Solutions, an Israel-based company, wants to “do nothing less than dim the sun” with a plan “modeled on volcanoes,” said The New Yorker . Average global temperatures dropped in the aftermath of the Mount Pinatubo eruption in the Philippines in 1991. Stardust wants to “market eruptions of its own” using “highly reflective particles” sprayed across the stratosphere.

The plan comes with likely tradeoffs, with possible side effects including “shifts in regional weather patterns” that people depend on for c

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