A kind of fog, which is darkened and becomes quite heavy due to the presence of fine droplets of various chemicals and ozone, usually caused by the reaction of sunlight with automobile exhaust fumes and industrial pollutants.
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A kind of fog, which is darkened and becomes quite heavy due to the presence of fine droplets of various chemicals and ozone, usually caused by the reaction of sunlight with automobile exhaust fumes and industrial pollutants.
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