ICSE BoardEnglish MediumSTD 9GeographyPollution2 Marks
Question
Explain with examples the difference between the primary and secondary pollutants.
✓
Answer
Primary pollutants are directly mixed with atmosphere e.g. smoke$,$ ash$,$ fumes$,$ dust$,CO_2$ Sulphur dioxide Methane$,$ Benzene$,$ etc. Secondary pollutants are created by automobiles e.g. Nitrogen oxides$,$ hydrocarbons$,$ etc$,$ which are more toxic than their original elements.
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