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(i) What is somg ? Is it a primary or se...

(i) What is somg ? Is it a primary or secondaryy pollutant ?
(ii) Why is it harmful to man ? Justify by giving two reasons.

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(i) It is a dark fog formed by condensation of water vapour, dust and smoke particles, and various gaseous pollutants such as oxides oxides ofnitrogen, sulphur dioxide, hydrogen sulphide etc. in the troposhere , It is a secondary pollutant.
(ii) `*` Smog reduces visibility leading to accidents.
`*` It produces respiratory problems, particularly in youngones and old people.
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