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Option 1 : Air pollution
- Photochemical smog is related to Air pollution.
- Photochemical smog happens when nitrogen oxides and volatile organic compounds react together in the presence of sunlight as a catalyst and form ozone at lower levels.
- The effects of smog on human health and the environment are serious and harmful.
- The main components of photochemical smog are nitrogen oxides, Volatile Organic Compounds (VOCs), tropospheric ozone, and PAN (peroxyacetyl nitrate).
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