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Environmental Chemistry of Ozone Depletion
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Halons
Similar to CFCs, halons release bromine and chlorine upon breakdown by UV radiation, which then deplete ozone.
Chlorofluorocarbons (CFCs)
CFC molecules release chlorine atoms upon UV radiation exposure, which catalytically destroy ozone molecules in the stratosphere.
Chloroform ()
When broken down by UV radiation, chloroform can release chlorine atoms that contribute to ozone depletion.
Chlorobenzene ()
Although less common, chlorobenzene can release chlorine which contributes minimally to stratospheric ozone depletion.
Hydrobromofluorocarbons (HBFCs)
HBFCs release bromine upon breakdown, which is highly effective in catalyzing the destruction of the ozone molecules.
Methyl Chloroform ()
UV radiation breaks down methyl chloroform, releasing chlorine atoms which then participate in ozone depletion.
Hydrochlorofluorocarbons (HCFCs)
HCFCs release chlorine and sometimes fluorine that can destroy ozone, although they're less stable and less abundant than CFCs.
Nitrous Oxide ()
In the stratosphere, releases nitric oxide (NO), which then participates in catalytic reactions that decompose ozone molecules.
Bromochloromethane ()
This chemical releases both bromine and chlorine when decomposed by UV, both contributing to ozone layer depletion.
Methyl Bromide ()
UV radiation helps break down methyl bromide into bromine atoms, which are highly effective in destroying ozone molecules.
Carbon Tetrachloride ()
In the stratosphere, is photolyzed by UV radiation to release chlorine atoms that catalyze the breakdown of ozone.
Tetrachloroethylene ()
Also known as perchloroethylene, this chemical releases chlorine when degraded by UV light, contributing to the ozone depletion process.
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