Primary pollutant
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Secondary Pollutant
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1. Primary pollutants are the pollutants that are
emitted directly from the sources and are found in the atmosphere in the form
in which they were emitted.
2. Examples: Ash, smoke, radioactive compounds, oxides
of sulphur etc.
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1. Secondary pollutants are the pollutants that are
formed in the atmosphere by chemical reactions between primary pollutants and
atmospheric constituents.
2. Examples: SO3 m O3 , Ketones,
Peroxyacetyl nitrate.
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