Biology · Environmental Issues
निम्नलिखित में से कौन सा जल प्रदूषण का मानवजनित (anthropogenic) स्रोत नहीं है?
- 1ह्यूमस पदार्थ✓
- 2औद्योगिक अपशिष्ट
- 3सीवेज (मलजल)
- 4घरेलू अपशिष्ट
सही उत्तर देखें
ह्यूमस पदार्थ
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