there are less pollution formed in antartica but still how could a defect be formed in the ozone layer above it

Dear student,                                                                                                                          
Please find below the solution to the asked query       

 Pollution is not the only cause of ozone layer depletion. Some other causes are- volcanic eruptions which release particulate matter and gases harmful for ozone layer, chemicals, release of CFCs, methyl bromide, chloroform etc. 
Though the pollution levels in Australia are low as compared to other countries, but the other factors such as volcanic emissions are quiet high. This causes a defect to be formed in the ozone layer above it.


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