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Question
Main pollutants released from petroleum refineries is
Options:
A .  CO, SO₂ & H₂S.
B .  CO₂, NO & SO₃.
C .  CO₂, H₂S & NO₂.
D .  SO₃, NO₂ & CO₂.
Answer: Option A
Answer: (a).CO, SO₂ & H₂S.

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