1.

_ Main pollutants released from petroleum refineries is$?

A. CO, SO‚ÇÇ & H‚ÇÇS
B. CO‚ÇÇ, NO & SO‚ÇÉ
C. CO‚ÇÇ, H‚ÇÇS & NO‚ÇÇ
D. SO‚ÇÉ, NO‚ÇÇ & CO‚ÇÇ
Answer» B. CO‚Äö√á√á, NO & SO‚Äö√á√â


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