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Which of the following is not caused entirely or partially by human activities? Updated 1 hour ago: A. The greenhouse effect B. Global warming C. Ozone D. Smog
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Which of the following is not caused entirely or partially by human activities?

Updated 1 hour ago:
A. The greenhouse effect

B. Global warming

C. Ozone

D. Smog

User Bharti Ladumor
by
4.6k points

1 Answer

0 votes
C. I’m pretty sure the answer is Ozone.
User Bertil Chapuis
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