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Q. ‘Ozone hole’ means
A. increase in the concentration of ozone
B. decrease in the concentration of ozone
C. same concentration of ozone
D. hole in the stratosphere
Answer: decrease in the concentration of ozone
A. increase in the concentration of ozone
B. decrease in the concentration of ozone
C. same concentration of ozone
D. hole in the stratosphere
Answer: decrease in the concentration of ozone
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