With reference to Ozone depletion, consider the following statement
1.CFC molecules are heavier than air.
2.Ozone hole is always formed over the source of CFC
1) 1
2) 2
3) 12
4) none
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With reference to Ozone depletion, consider the following statement
1.CFC molecules are heavier than air.
2.Ozone hole is always formed over the source of CFC
1) 1
2) 2
3) 12
4) none
1) 1