

MCQOPTIONS
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1. |
Ozone is an important constituent of stratosphere because it |
A. | destroys bacteria which are harmful to human life. |
B. | prevents the formation of smog over large cities. |
C. | removes poisonous gases of the atmosphere by reacting with them. |
D. | absorbs ultraviolet radiation which is harmful to human life. |
Answer» E. | |