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2 June, 01:21

What's a secondary air pollutant

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  1. 2 June, 04:23
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    Secondary air pollutants are pollutants which form in the atmosphere.

    Explanation:

    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.
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