Photochemical smog formation can be compared to a mixture of pollutants created when volatile organic compounds and nitrogen oxides interact with sunlight.
As a result, they make a brownish haze that can be seen above the cities, usually in the summer months when there is lots of sun.
Primary and secondary pollutants
1. Primary pollutants include volatile organic compounds and nitrogen oxides.
2. When they react with sunlight, they create secondary pollutants, meaning the ozone at ground level, or other harmful compounds like peroxyacetyl nitrate.
Formation of Photochemical Smog
Effects of Photochemical Smog
|1. Nitrogen oxides||can contribute to problems with heart and lungs.|
links to decreased resistance to infection.
|2. Volatile organic compounds (VOCs)||eye irritation|
some compounds are carcinogens
|3. Ozone||coughing and wheezing|
respiratory problems (particularly for conditions such as asthma)
|4. Peroxyacetyl nitrate (PAN)||eye irritation|