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Biology 21 Online
OpenStudy (anonymous):

Why is smog a more serious problem in the southern United States than in the northern United States? A. Global warming is worse in the southern United States. B. Acid rain is worse in the southern United States. C. Sunlight is more abundant in the southern United States. D. There are more pollutants in the northern United States.

OpenStudy (anonymous):

what do you think?

OpenStudy (anonymous):

C.

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