Which of the following contributes to both global warming and ozone-layer depletion?
A
Nitrogen dioxide
B
CFCs
C
Ammonia
D
All of the above
Correct Option:
B
Explanation
Chlorofluorocarbons (CFCs) are relevant to both problems: they are potent greenhouse gases, and once they reach the stratosphere they can release chlorine that catalytically destroys ozone.
