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sunil1285 sunil1285
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6 years ago
Ozone is ________. In the upper atmosphere it ________.
 a. O3; is a pollutant.
 b. O2; absorbs ultraviolet energy
 c. O3; absorbs ultraviolet energy.
 d. O2; is a pollutant.
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premed9premed9
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6 years ago
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