Synonyms of 'smog'
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When there is fog, there are tiny drops of water in the air which form a thick cloud and make it difficult to see things.
The crash happened in thick fog.
If there is a haze of something such as smoke or steam, you cannot see clearly through it.
Dan smiled at him through a haze of smoke and steaming coffee.
Thesaurus for smog from the Collins English Thesaurus
Smog is a mixture of fog and smoke which occurs in some busy industrial cities.