BLOOMBERG.COM

Here’s a scary thought: What if we’re too late to stop devastating climate change? We talk a lot about prevention. Harvard physicist David Keith says we should be thinking about triage. Keith is researching solar geoengineering—spraying aerosols into the upper atmosphere that act as tiny mirrors, reflecting some sunlight back to space and cooling the planet. His lab built a mini-atmosphere to test how different aerosols might react.

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