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Physics, 01.07.2019 10:10 tremainewoodley3030

Waste water story- (1)
observe your locality carefully and make a survey
on open drain or man holes. are they a source of
bad odor? make a report on treatment of open
drains with disinfectants like bleaching powder and
mosquito sprays and their effect on the
environment.
plz somebody me
its urgent

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Answers: 3

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Waste water story- (1)
observe your locality carefully and make a survey
on open drain o...
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