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  1. Main pollutants released from iron and steel industry are

    2. A.

     CO, CO2 and SO2
    B.

     NO, SO3 and H2S
    C.

     CO2, H2S and NO2
    D.

     CO2, NO2 and SO3

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    Answer : Option A

    Explanation :

    Main pollutants released from iron and steel industry are CO, CO2 and SO2.

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