Answers

2016-04-22T21:08:00+05:30
Hydrogen sulphide (H₂S) released from sewage treatment and is very toxic..
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The Brainliest Answer!
2016-04-22T21:10:55+05:30
 methane , ch4 and n2o gases  are leaved from sewage treatment.
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plz mark as brainliest answer
sure :)
very very thanks