Ozone-hole in the atmosphere is largely caused by the presence of

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Q: (SSC/0)
Ozone-hole in the atmosphere is largely caused by the presence of
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question_subject: 

Geography

question_exam: 

SSC

stats: 

0,16,1,0,0,16,1

keywords: 

{'ozone': [3, 0, 3, 5], 'atmosphere': [1, 1, 4, 7], 'oxygen': [3, 0, 1, 0], 'carbon': [1, 0, 4, 5], 'hydrogen': [0, 0, 1, 3], 'active waste': [1, 0, 0, 0], 'hole': [2, 0, 1, 1]}