4. This is a by-product of sewage treatment and can be decomposed to produce biogas
a) Sewage
b) Sludge
d) Scum
c) Sewer
d) Scum
Answers
Answered by
6
Explanation:
SEWAGE IS CORRECT ANSWER
PLEASE MAKE BRAINLIST HEARTILY AND THANKSGIVING ALSO
Answered by
4
Answer:
the answer is d scum
plz mark it brainllest
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