Question

What is a SMOG and how is it formed?

Answer 1

SMOG means smoke + fog. when fog mixes wirh smoke it forms smog.it is very harmfuk to human beings.when this smog cimes in contact with direct sunlight it forms photochemical smog.

Answer 2

smog is the water vapors with pollutants like CO,NOx,etc.
it is form ed when water droplets are present near a huge collection of pollutants and gets mixed with them.it is a very harmful thing and can be fatal.