Teaching Bihar Sakshamta Pariksha (Niyojit Shikshak) Mock Test 2024 Environmental Studies Environment Pollution

एक ही बिंदु से आने वाले जल प्रदूषण को कहते है:

1
एकल बिंदु प्रदूषण
2
बिंदु स्रोत प्रदूषण
3
चरम प्रदूषण
4
प्रत्यक्ष प्रदूषण
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