Clearing some air over warming in Europe

A decline in fog and haze clears the air but also fuels 10 to 20 percent of the warming in Europe, a new study concludes

A substantial part of the long-term warming seen in Europe during recent decades is the result of a decline in the region’s pollution and fog, a new study suggests.

Aerosols — tiny particles or droplets suspended in the atmosphere, such as fog, smoke and various pollutants — scatter light and cut down on visibility.