Seudónimo Seudónimo
  • 23-02-2018
  • English
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The National Ambient Air Quality Standards (NAAQS) are maximum allowable levels for _____ harmful pollutants.

a, sixteen
b.sixty
c.six 
d.ten

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Respuesta :

fernandez10 fernandez10
  • 18-06-2018
C. Six hope this is the correct answer 
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