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How Pollution Suppresses Rain

Atmospheric aerosols reflect sunlight towards space, cooling Earth, and partially counteracting the greenhouse effect. But, as
 Toon
 discusses in this Perspective, this is not the only way in which aerosols affect climate. Satellite data presented by Rosenfeld on page
 1793
 show substantially reduced precipitation downwind from the pollution source. The mechanisms by which pollution may suppress rain remain poorly understood, and different effects may occur depending on the type of pollution and the atmospheric conditions.