a. Ozone and PAN acts as powerful eye irritants
b. Ozone and nitric oxide irritate the nose and throat, and then high concentration cause headache, chest pain, and dryness of the throat, cough and difficulty in breathing.
c. It also cause and corrosion and painted surfaces
d.It leads to cracking of rubber and extensive damage to plants life. Control of photochemical smog
1. Use of catalysts converters in automobiles which prevents the release of oxides of nitrogen and hydrocarbons to the atmosphere
2. Certain plants e.g.…pinus, Juniparus, Quercus & Vitis can metabolize oxides of nitrogen and therefore, their plantation could help in this matter.