CFCs and the ozone layer
CFCs and the ozone layer
Formula
Cl• + O₃ → ClO• + O₂; ClO• + O → Cl• + O₂
Real World
The 1985 discovery of the Antarctic ozone hole by the British Antarctic Survey led to the Montreal Protocol, which banned CFC production and is now regarded as the most successful international environmental agreement ever signed.
Exam Focus
Identify initiation, propagation, and termination steps separately — examiners award mechanism marks for each labelled stage.
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