People Development & Environment Environmental Issues Pollution

खालीलपैकी कोणते प्रदूषण मोजण्यासाठी B.O.D चाचणी केली जाते?

1
ध्वनी प्रदूषण
2
जल प्रदूषण
3
मृदा प्रदूषण
4
वायू प्रदूषण

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