18. Solids like faeces which settle at the bottom of a large tank during treatment in
water plant is called
A silt
B. pond scum C. emulsion
D. sludge
Th
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Answer:
Option D is Correct
Explanation:
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Answer:
hy devil here
Explanation:
रीजनल 3R (Reduce, Reuse and Recycle) फोरम से सम्बंधित तथ्य
इसका उद्देश्य उद्योग, सेवा और कृषि क्षेत्र में रिड्यूस, रियूज और रिसाइकल की अवधारणा को बढ़ावा देना है।
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