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I don’t know what the answer is. Plz help

I don’t know what the answer is. Plz help-example-1

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0 votes

Answer:

A

Step-by-step explanation:

Hope this helps!

User Miichi
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6 votes

Answer:

primary pollutant

Step-by-step explanation:

A primary pollutant is an air pollutant emitted directly from a source. A secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.

User Victoire
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