alleryChlorofluorocarbons (CFCs) damage the ozone layer because they:
AReflect UV back into space (option)
BRelease chlorine atoms that catalytically destroy ozone
CAbsorb visible light
DAdd nitrogen to the air
Answer & Solution
Correct answer: B. Release chlorine atoms that catalytically destroy ozone
1. CFCs rise to the stratosphere and decompose under UV.
2. Released chlorine reacts with ozone, breaking it into O₂.
3. A single Cl atom can destroy many ozone molecules.
_Source: syllabus Science, Ch 13 "Our Environment", §13.2.1_
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