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3 votes
Which is an indicator of poor air quality?

1 salt
2 bacteria
3 fertilizer
4 smog

User Ironpaw
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2 Answers

2 votes

Answer:

Smog

Step-by-step explanation:

User Mathias Dpunkt
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2 votes
Which is an indicator of poor air quality?

4. Smog
User Pallab
by
9.2k points