What is the word origin of the word smog?

Answer 1

Smog -it is unhealthy for us to breathe..

The word smog is made of two different words smoke+fog..

.....this is the answer..

Answer 2

The word smog is a combination of "smoke" and "fog." It was first used in the early 20th century to describe the atmospheric pollution caused by a mixture of smoke and fog in industrial areas. The term was first coined in London, but the phenomenon was observed in other industrial cities as well.