Secondary Pollutants

• form in the atmosphere through chemical and photochemical reactions from the primary pollutants
• examples include:
  • sulfuric acid H2SO4
    • can cause respiratory problems
  • nitrogen dioxide NO₂
    • gives air a brownish coloration
    •  
  • ozone O3
    • colorless gas
    • has a sweet smell
    • is an oxidizing agent - lung tissue to rubber products
    • irritates the eyes

• the primary and secondary pollutants are found in either of the following two types of smog:

1. London-type smog
2. photochemical smog (produced in L.A. and many other urban areas around the world)

How are the London and L.A.-type smogs produced??????