Risky Climate

The Costs of Climate Tipping Points Add Up

New research shows significant economic costs of climate risks.

Photographer: Sean Gallup/Getty Images 

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Tell me if you’ve heard this one before: Climate change isn’t about what we know, it’s about what we don’t. What we know is bad enough, what we don’t is potentially much worse. Consider, also, the irreversible, large-scale events — tipping points, like the Amazon drying out, the West-Antarctic or the Greenland ice sheet disintegrating — and the costs start to add up.