Q260
Smog is
A.
Nothing but black smoke
B.
A combination of smoke and fog
AnswerC.
A liquid particle resulting from vapour condensation
D.
A solid particle, e.g., fllyash
Answer: Option B
Solution
Answer: Option B
Solution:
Smog is air pollution that reduces visibility. The term "smog" was first used in the early 1900s to describe a mix of smoke and fog. The smoke usually came from burning coal. Smog was common in industrial areas, and remains a familiar sight in cities today. Today, most of the smog we see is photochemical smog.