What is smog ?

In the early December 2012, Capital Delhi was in news for smog due to increased air pollution. Smog resulted in reduced visibility and consequent road accidients, traffic jams,and also caused harmful effects to biotic components in the capital. (i) What is smog? Is it is primarily or secondary pollutant? (ii) Justify by giving two reasons why is it harmful to human beings.

What is found in photochemical smog -

What is photochemical smog and what are its harmful effects?

What is photochemical smog? How does smog affect the biological world?

What is photochemical smog ? Discuss the possible mechanism of its formation.

What is the composition of photochemical smog?

What is the nature of photochemcial smog ?