Question

why smog is a visible indication of air pollution?

Answer 1

Smog is a type of air pollution; the word "smog" was coined in the early 20th century as a portmanteau of the words smoke and fog to refer to smoky fog.

Smog is caused by the burning of large amounts of coal within a city; this smog contains soot particulates from smoke, sulfur dioxide and other components.

Hence we can say that smog is a visible indication of air pollution 

Answer 2

Answer:

Smog is a type of air pollution; the word "smog" was coined in the early 20th century as a portmanteau of the words smoke and fog to refer to smoky fog.

Smog is caused by the burning of large amounts of coal within a city; this smog contains soot particulates from smoke, sulfur dioxide and other components.

Hence we can say that smog is a visible indication of air pollution

Explanation: