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7.2 - Photochemical Smog APES Exam Questions and Answers 2024( A+ GRADED 100% VERIFIED).
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7.2 - Photochemical Smog APES Exam Questions and Answers 2024( A+ GRADED 100% VERIFIED).
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7.2 - Photochemical Smog APESExplain the causes and effects of photochemical smog and methods to reduce it.
Photochemical smog
A mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds
(VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in
summer, because that is when we have the most sunlight.
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Primary pollutants of Photochemical Smog
Nitrogen oxides and VOCs combine to change in sunlight in a series of chemical reactions,
outlined below, to create what are known as secondary pollutants.
Secondary pollutants of Photochemical Smog
Ozone that forms at
ground level. While ozone is produced naturally in the upper atmosphere, it is a
dangerous substance when found at ground level. Many other hazardous
substances are also formed, such as peroxyacetyl nitrate (PAN).
When is Photochemical smog formed?
When nitrogen oxides and volatile organic hydrocarbons react with heat and sunlight to produce
a variety of pollutants.
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