Smog is a combination of -

Which of the following statements are true? (i) Cigarette smoke is a source of carbon monoxide. (ii) Smog is a combination of smoke and fog which mainly contains CFCs. (iii) Burning of coal releases fly ash. (iv) Acid rain increases the pH of rivers and lakes.

Smog is combination of

Smog is combination of

Smog is combination of

Smog is combination of

During the month of November in 2017, there was Smog in the environment. Actually the Smog is combination of

Name two components of photochemical smog and mention one of the harmful effects of this smog.