1.

The majority of the ozone (about 97% ) found in the atmosphere is concentrated in the stratosphere at an altitude of

A. 15 to 55 kilometers above the Earth's surface
B. 15 to 30 kilometers above the Earth's surface
C. 20 to 30 kilometers above the Earth's surface
D. 20 to 40 kilometers above the Earth's surface
Answer» B. 15 to 30 kilometers above the Earth's surface


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