Dimming the Sun is a terrifying new industry

Solar geoengineering, a bunch of techniques that aim to mask some effects of climate change by blocking sunlight, isn’t on the agenda for this month’s COP30. It ought to be. A record-breaking funding round for companies doing this stuff shows people are getting serious about trying to artificially cool the planet. That’s terrifying, especially when these businesses are largely unregulated.

In a recent poll of climate researchers, two-thirds said they thought there’d be an attempt to deploy large-scale solar radiation modification (SRM) by…