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Which human activity depletes the ozone layer?

A. planting genetically-modified crops

B. using solar power to generate electricity

C. fighting fires with halon-containing fire extinguishers

D . purifying crude metals by heating them to their liquid state

User Mangrio
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Answer:

purifying crude oil metals by heating them to liquid state

User BlackEye
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Answer:i think it is C

User HamiltonUlmer
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