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smog formation
from volatile organic compounds, NO and sunlight
smog examples
London, 1952
Los Angeles
Beijing
oxidation of carbon monoxide
The oxidants in atmospheric chemistry are O2 and free radicals, OH, NO.
The OH radical is the most important.
OH initiation
leads to an ozone layer but in the wrong place. This can be harmful as ozone is an irritant and can damage agricultural material
peroxylacetylnitrate (PAN)
PAN allows smog to move and can cause NO2 radicals when it starts to decompose
smog episode progression
more and more OH and OOH radicals are formed - also reactants in the reactions - reactions get faster over time (autocatalysis)
X as a halogen
CFC gases and halons
what can the halogen act as
an ozone destruction catalyst