Environment & Ecology · Environment
जल में ई. कोलाई (E. coli) की उच्च मात्रा का पाया जाना किसका संकेत देता है?
- 1सीवेज/मलजल प्रदूषण✓
- 2पीने योग्य जल
- 3रासायनिक उद्योग से प्रदूषण
- 4लवणीय जल
सही उत्तर देखें
सीवेज/मलजल प्रदूषण
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