Ozone layer is present in
A. troposphere
B. lonosphere
C. stratosphere
D. exosphere
Answer: Option C
A. troposphere
B. lonosphere
C. stratosphere
D. exosphere
Answer: Option C
The term 'brown air' is used for
A. Acid fumes
B. Photochemical smog
C. Sulphurous smog
D. Industrial smog
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