Geoengineering approaches to reduce climate change unlikely to succeed

Reducing the amount of sunlight reaching the planet’s surface by geoengineering may not undo climate change after all. Researchers used a simple energy balance analysis to explain how the Earth’s water cycle responds differently to heating by sunlight than it does to warming due to a stronger atmospheric greenhouse effect. Further, they show that this difference implies that reflecting sunlight to reduce temperatures may have unwanted effects on the Earth’s rainfall patterns.

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