A. reduction of oxygen concentration in the atmosphere
B. depletion of the ozone layer
C. screening of ultra violet rays
D. increase in carbon dioxide concentration
Correct Answer: Option B
B. depletion of the ozone layer
A. reduction of oxygen concentration in the atmosphere
B. depletion of the ozone layer
C. screening of ultra violet rays
D. increase in carbon dioxide concentration
Correct Answer: Option B
B. depletion of the ozone layer
Copyright warnings! Do not copy.