Environment & Ecology · Environmental Studies
ताजे पानी के निकायों में जैविक प्रदूषण का प्राथमिक स्रोत क्या है?
- 1औद्योगिक अपशिष्ट
- 2सीवेज का अपशिष्ट (मलजल बहिस्त्राव)✓
- 3कृषि खेतों से अपवाह
- 4शहरी क्षेत्रों का अपवाह (रन-ऑफ)
सही उत्तर देखें
सीवेज का अपशिष्ट (मलजल बहिस्त्राव)
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