Environment & Ecology · Environmental Studies
मीठे पानी (ताजे जल) के निकायों में जैविक प्रदूषण का मुख्य स्रोत है:
- 1औद्योगिक बहिःस्राव
- 2सीवेज का बहिःस्राव✓
- 3कृषि क्षेत्रों का अपवाह
- 4शहरी क्षेत्रों का अपवाह
सही उत्तर देखें
सीवेज का बहिःस्राव
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