A) stroring them in underground storage tanks
B) using them for producing biogas
C) vermiculture
D) using them directly as biofertilizers
Correct Answer: B
Solution :
Pollution from human excreta and organic wastes from kitchen can be most profitably minimized by using them for producing biogas. These wastes release methane and other gases as a result of action of anaerobic micro-organisms. Biogas contain methane in bulk and other gases like \[C{{O}_{2}},\,{{H}_{2}},\,{{N}_{2}}\] and \[{{O}_{2}}\].
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