2. Which pollutions are belongs to secondary air pollutants
3. The main source of water pollution is:
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Answer:
2...Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.
3...The largest source of water pollution in India is untreated sewage. Other sources of pollution include agricultural runoff and unregulated small-scale industry. Most rivers, lakes and surface water in India are polluted due to industries, untreated sewage and solid wastes.
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Answer:
3. Untreated sewage
Explanation:
Because most of the water pollution is due to untreated sewage,industrial waste and solid wastes.
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