railway RRB JE (CBT I + CBT II) Mock Test 2024 People Development & Environment Environmental Issues Pollution

सीसा (लेड) प्रदूषण का मुख्य स्रोत क्या है?

1
सीवेज 
2
सीसा युक्त (लेड) गैसोलीन
3
तम्बाकू 
4
कीटनाशक
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