The desperate race to cool the ocean before it’s too late

Over 500 million people depend on reef ecosystems for food and livelihoods. "Even if the temperature increase eventually stabilizes at 1.5 °C a century or two from now, it's not known how well coral reef ecosystems will survive a temporary overshoot to higher temperatures." In this excerpt from her book 'After Geoengineering: Climate Tragedy, Repair, and Restoration', published in MIT Technology Review, Holly Jean Buck explains the dangers of rising ocean temperatures, and whether geoengineering could be a viable solution.