Chapter 24: Air Pollution. A Brief History of Air Pollution. The atmosphere has long been a sink for waste disposal. Long history of recognition of the existence of atmospheric pollutants Natural photochemical smog recognized in 1550 Acid rain first described in 17 th century
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Occurs primarily in summer and fall.
Occurs when cloud cover associated w/ stagnant air
Cl + O3 → ClO + O2
ClO + O → Cl + O2