Name any four gaseous pollutants.
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Four gaseous pollutants are :
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Define the following terms :
(i) pollution
(ii) pollutant
(iii) air pollution.
What are primary and secondary pollutants ?
Name the compounds of sulphur that cause air pollution. Also, state their harmful effects.
State:
(i) natural sources of air pollution
(ii) man-made sources of air pollution