Which of the following are hazardous to the environment because they deplete ozone layer leading to the formation of ozone hole?
A. CO2
B. Cl2
C. CFCs
D. O3
Answer: Option C
A. CO2
B. Cl2
C. CFCs
D. O3
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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