A potential explanation for urban smog: Aerosol particle growth higher in cold climates

The effect of nitric acid on aerosol particles in the atmosphere may offer an explanation for the smog seen engulfing cities on frosty days. Under laboratory conditions, researchers at CERN in Switzerland observed the formation of atmospheric aerosols and discovered new information on the link between nitrogen oxides originating in traffic and the energy industry, and the climate and air quality. These findings were published in the Nature and Science Advances journals.

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